diff --git a/Makefile b/Makefile
index e565a43aa05520615170c286f67ebbc0c546f3e5..3bd777250f1cb1e13255c287ddd3c3bbbcb323ae 100644
--- a/Makefile
+++ b/Makefile
@@ -59,7 +59,7 @@ test-fixtures:
 test-fixtures-run:
 	arkindex/manage.py migrate
 	arkindex/manage.py build_fixtures
-	arkindex/manage.py dumpdata --indent 4 dataimport documents images users > arkindex/documents/fixtures/data.json
+	arkindex/manage.py dumpdata --indent 4 dataimport documents images users auth > arkindex/documents/fixtures/data.json
 
 test-fixtures-restore:
 	# This first renaming ensures that arkindex_tmp_fixtures exists; we don't want to drop arkindex_dev without a backup
diff --git a/README.md b/README.md
index 3fbc74e666a09353997a6c844d3eece1c682591c..3802cd96ef00ad3fa440edbb90f09fd8648564d7 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,17 @@ backend/arkindex$ ./manage.py shell
 
 Note that this local server will only work inside Docker.
 
+### User groups
+
+Two groups have a special meaning in Arkindex: The `Demo` group, for demo users, and the `Internal` group, for special users whose tokens are used by workers. Those groups are configured using the `INTERNAL_GROUP_ID` and `DEMO_GROUP_ID` settings. The development server will show warnings but let you start the server anyway if the group aren't there; you will be able to access the Django admin and create the groups from there. To create them using the shell:
+
+```
+backend/arkindex$ ./manage.py shell
+>>> from django.contrib.auth.models import Group
+>>> Group.objects.create(id=1, name='Demo')
+>>> Group.objects.create(id=2, name='Internal')
+```
+
 ## Usage
 
 ### Makefile
diff --git a/arkindex/dataimport/api.py b/arkindex/dataimport/api.py
index f04ae80e301715a1317fbe81982ce0236fca0407..ef34c1183d2a8fa8862a96d2e6f6e5e93ee57349 100644
--- a/arkindex/dataimport/api.py
+++ b/arkindex/dataimport/api.py
@@ -13,7 +13,7 @@ from rest_framework.response import Response
 from rest_framework import status
 from rest_framework.exceptions import ValidationError
 from arkindex.project.mixins import CorpusACLMixin
-from arkindex.project.permissions import IsAuthenticated, IsAdminUser
+from arkindex.project.permissions import IsVerified, IsAuthenticated, IsAdminUser
 from arkindex.documents.models import Corpus, Right, Element, ElementType
 from arkindex.dataimport.models import \
     DataImport, DataFile, DataImportMode, DataImportFailure, Repository, Event, EventType
@@ -35,7 +35,7 @@ class DataImportsList(CorpusACLMixin, ListAPIView):
     """
     List data imports
     """
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = DataImportLightSerializer
 
     def get_queryset(self):
@@ -85,7 +85,7 @@ class DataImportRetry(CorpusACLMixin, GenericAPIView):
     """
     Retry a failed import
     """
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = DataImportSerializer
 
     def get_queryset(self):
@@ -107,7 +107,7 @@ class DataImportFailures(ListAPIView):
     List a single import's errors
     """
 
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = DataImportFailureSerializer
 
     def get_queryset(self):
@@ -122,7 +122,7 @@ class DataImportFromFiles(CreateAPIView):
     Create, configure and start a workflow from one or more DataFiles
     """
 
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = DataImportFromFilesSerializer
 
     def create(self, *args, **kwargs):
@@ -221,7 +221,7 @@ class DataFileList(CorpusACLMixin, ListAPIView):
     """
     List uploaded files
     """
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = DataFileSerializer
 
     def get_queryset(self):
@@ -232,7 +232,7 @@ class DataFileRetrieve(CorpusACLMixin, RetrieveUpdateDestroyAPIView):
     """
     Get one file
     """
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = DataFileSerializer
 
     def get_queryset(self):
@@ -314,7 +314,7 @@ class GitRepositoryImportHook(APIView):
 
 
 class RepositoryList(ListAPIView):
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = RepositorySerializer
 
     def get_queryset(self):
@@ -324,7 +324,7 @@ class RepositoryList(ListAPIView):
 
 
 class AvailableRepositoriesList(ListCreateAPIView):
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     pagination_class = None
     serializer_class = ExternalRepositorySerializer
 
@@ -348,7 +348,7 @@ class AvailableRepositoriesList(ListCreateAPIView):
 
 
 class RepositoryRetrieve(CorpusACLMixin, RetrieveDestroyAPIView):
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = RepositorySerializer
 
     def get_queryset(self):
diff --git a/arkindex/dataimport/tests/test_files.py b/arkindex/dataimport/tests/test_files.py
index 4f52db9941f7ffbcfbed5b5f1c9af65323e153e2..c6fc5ad0d82fe4071cd39a1154942a754b51ccac 100644
--- a/arkindex/dataimport/tests/test_files.py
+++ b/arkindex/dataimport/tests/test_files.py
@@ -1,6 +1,5 @@
 from rest_framework import status
 from django.urls import reverse
-from django.contrib.auth.models import Group
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.conf import settings
 from django.test import override_settings
@@ -12,7 +11,7 @@ import uuid
 import os
 
 
-@override_settings(INTERNAL_GROUP_ID=999)
+@override_settings(DEMO_GROUP_ID=2)
 class TestFiles(FixtureAPITestCase):
     """
     Test file management
@@ -21,15 +20,12 @@ class TestFiles(FixtureAPITestCase):
     @classmethod
     def setUpTestData(cls):
         super().setUpTestData()
-        cls.demo_user = User.objects.create_user('test@test.test', 'testtest')
-        cls.group = Group.objects.create(name='Demo')
-        cls.demo_user.groups.add(cls.group)
+        cls.demo_user = User.objects.get(email='demo@demo.fr')
         cls.demo_user.corpus_right.create(corpus=cls.corpus, can_write=True)
 
     def setUp(self):
         super().setUp()
-        self.assertNotEqual(self.group.id, settings.INTERNAL_GROUP_ID)
-        self.client.force_login(self.demo_user)
+        self.client.force_login(self.user)
 
     def test_file_list(self):
         df = DataFile.objects.create(
@@ -130,6 +126,7 @@ class TestFiles(FixtureAPITestCase):
         """
         Assert a file upload fails for demo users when its size exceeds the corpus limit
         """
+        self.client.force_login(self.demo_user)
         # Create a file one byte under the allowed size
         DataFile.objects.create(
             name='test.txt', size=52428799, hash='aaaa', content_type='text/plain', corpus=self.corpus)
diff --git a/arkindex/documents/api/elements.py b/arkindex/documents/api/elements.py
index 293e000502f989a09e1b4c2f4dc1be7f937e8c22..965ab18b9d9fc95b77e3dd509da16cae36c39741 100644
--- a/arkindex/documents/api/elements.py
+++ b/arkindex/documents/api/elements.py
@@ -8,7 +8,7 @@ from arkindex.documents.serializers.elements import (
 )
 from arkindex.documents.models import Element, ElementType, Page, Act, Corpus, Right
 from arkindex.project.mixins import CorpusACLMixin
-from arkindex.project.permissions import IsAuthenticatedOrReadOnly
+from arkindex.project.permissions import IsVerifiedOrReadOnly
 
 
 class ElementsList(CorpusACLMixin, ListAPIView):
@@ -93,7 +93,7 @@ class CorpusList(ListCreateAPIView):
     """
     serializer_class = CorpusSerializer
     pagination_class = None
-    permission_classes = (IsAuthenticatedOrReadOnly, )
+    permission_classes = (IsVerifiedOrReadOnly, )
 
     def get_queryset(self):
         return Corpus.objects.readable(self.request.user)
@@ -104,7 +104,7 @@ class CorpusRetrieve(RetrieveUpdateDestroyAPIView):
     Get, update and delete corpora
     """
     serializer_class = CorpusSerializer
-    permission_classes = (IsAuthenticatedOrReadOnly, )
+    permission_classes = (IsVerifiedOrReadOnly, )
 
     def get_queryset(self):
         return Corpus.objects.readable(self.request.user)
diff --git a/arkindex/documents/api/ml.py b/arkindex/documents/api/ml.py
index d7ea871bf59fd591cf39bb1b0581e1cd2f95a267..2377f00a3cb316a7e5e672d2d81db772a57f9b49 100644
--- a/arkindex/documents/api/ml.py
+++ b/arkindex/documents/api/ml.py
@@ -9,13 +9,13 @@ from arkindex.documents.serializers.ml import \
 from arkindex.documents.indexer import Indexer
 from arkindex.images.models import Zone
 from arkindex.images.importer import build_transcriptions, save_transcriptions, index_transcriptions
-from arkindex.project.permissions import IsAuthenticated
+from arkindex.project.permissions import IsVerified
 from arkindex.project.polygon import Polygon
 
 
 class TranscriptionCreate(CreateAPIView):
     serializer_class = TranscriptionCreateSerializer
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
 
     def perform_create(self, serializer):
         transcription_type = serializer.validated_data['type']
@@ -74,7 +74,7 @@ class TranscriptionBulk(CreateAPIView):
     and parent element
     '''
     serializer_class = TranscriptionsSerializer
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
 
     def perform_create(self, serializer):
 
@@ -133,7 +133,7 @@ class ClassificationBulk(CreateAPIView):
     Create multiple classifications at once for a single element from a single ML tool
     """
     serializer_class = ClassificationsSerializer
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
 
     def perform_create(self, serializer):
         parent = serializer.validated_data['parent']
diff --git a/arkindex/documents/fixtures/data.json b/arkindex/documents/fixtures/data.json
index 45abb1daae53ff9428b498d950a1c97485eb8cb0..b029c1a8555315ae170ecdd6167b88e401917a62 100644
--- a/arkindex/documents/fixtures/data.json
+++ b/arkindex/documents/fixtures/data.json
@@ -1,22 +1,22 @@
 [
 {
     "model": "dataimport.repository",
-    "pk": "6cb81038-0316-43ce-a9f4-611c38b2d21b",
+    "pk": "f777ed27-fbe0-4fec-b344-f78070cfa264",
     "fields": {
         "url": "http://gitlab/repo",
         "hook_token": "hook-token",
-        "corpus": "6a3dfb5d-8c4a-4212-8839-10a4c75e9f5f",
-        "credentials": "434edb7d-46e2-42f8-80a9-de2a16958c4f",
+        "corpus": "ad8b0559-7d92-4634-a9d1-557a473a5b05",
+        "credentials": "656059a3-e70c-46b5-b2a0-bb4d34794df7",
         "provider_name": "GitLabProvider"
     }
 },
 {
     "model": "dataimport.revision",
-    "pk": "5842292c-7aac-45a6-910d-34c7d3c1b58a",
+    "pk": "ff7c4a7f-ca1c-4277-ab8c-d6a84977447e",
     "fields": {
-        "created": "2019-02-21T11:18:38.292Z",
-        "updated": "2019-02-21T11:18:38.292Z",
-        "repo": "6cb81038-0316-43ce-a9f4-611c38b2d21b",
+        "created": "2019-03-08T15:10:28.095Z",
+        "updated": "2019-03-08T15:10:28.095Z",
+        "repo": "f777ed27-fbe0-4fec-b344-f78070cfa264",
         "hash": "42",
         "ref": "refs/heads/master",
         "message": "a",
@@ -25,7 +25,7 @@
 },
 {
     "model": "documents.corpus",
-    "pk": "6a3dfb5d-8c4a-4212-8839-10a4c75e9f5f",
+    "pk": "ad8b0559-7d92-4634-a9d1-557a473a5b05",
     "fields": {
         "name": "Unit Tests",
         "description": "",
@@ -34,430 +34,430 @@
 },
 {
     "model": "documents.elementpath",
-    "pk": "0dff409a-6573-4877-b49d-5ed3ab7d3c11",
+    "pk": "0d8c5a5d-4dba-48ac-acd1-5a979d130ce9",
     "fields": {
-        "element": "2bb339be-cf43-46fa-be69-920da0339b60",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\"]",
-        "ordering": 0
+        "element": "f645b44c-52c8-449e-b73b-ebedc044729a",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\", \"50fe8cfd-222a-42c4-8b88-11af80d19ca9\"]",
+        "ordering": 3
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "14a1deeb-5021-4415-b8ff-4f5a87b92085",
+    "pk": "1d77dd8d-0403-474a-ae84-f19b8b00e2ac",
     "fields": {
-        "element": "431dd110-aa03-4e74-aca4-d7276c2c7a2b",
-        "path": "[\"42134c45-6acd-4f77-9dd5-0e82481c6495\", \"7e8a8e54-c419-4b7b-8b22-deb0cadef2c1\"]",
+        "element": "39e63c49-4f17-47f5-a30d-ff2f76f1427f",
+        "path": "[\"0d8822c0-f117-48c0-b07a-3539773d1fcb\", \"6559a60a-215a-4cc3-a96a-37dfe2740c2c\"]",
         "ordering": 2
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "350f5e80-ed09-4b85-ba8b-830e452bc977",
+    "pk": "2161930a-8524-4109-aa2f-d77f73bb569b",
     "fields": {
-        "element": "7e8a8e54-c419-4b7b-8b22-deb0cadef2c1",
-        "path": "[\"42134c45-6acd-4f77-9dd5-0e82481c6495\"]",
-        "ordering": 0
+        "element": "b3c809d6-e8c6-4dae-b459-a42de2e62d6c",
+        "path": "[\"0d8822c0-f117-48c0-b07a-3539773d1fcb\", \"6559a60a-215a-4cc3-a96a-37dfe2740c2c\"]",
+        "ordering": 1
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "413083ac-60d7-4982-8d5c-dd0c38386348",
+    "pk": "25378386-ca5f-4903-821b-1ba2d50b225a",
     "fields": {
-        "element": "5fc163e2-86dd-4dab-89d1-89fc9d2fc8a1",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\", \"03db6182-c24c-4b56-8e99-04706ceca550\"]",
+        "element": "0171957b-b3a1-45d3-bf3d-bd9879412d75",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\", \"50fe8cfd-222a-42c4-8b88-11af80d19ca9\"]",
         "ordering": 0
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "42774706-0f13-454b-83ba-ba0cb869cddd",
+    "pk": "2937b9e2-bfaf-4d5e-9a6f-c76d837b8a53",
     "fields": {
-        "element": "559d42c1-abe0-4bc3-8ccd-2701c555a571",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\"]",
+        "element": "ce37cf4d-935e-4891-b2db-c53907dde024",
+        "path": "[\"0d8822c0-f117-48c0-b07a-3539773d1fcb\", \"6559a60a-215a-4cc3-a96a-37dfe2740c2c\"]",
         "ordering": 0
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "52a9e8b7-5989-4cd4-ab1f-36a0071b0ead",
+    "pk": "31725cf5-e8fa-4e69-9234-c343f1f75e97",
     "fields": {
-        "element": "2a190b6b-c017-4840-9a7d-9234450d1bfd",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\", \"0221f848-d543-4a7e-9b32-f4bebbb91ee6\"]",
-        "ordering": 1
+        "element": "50fe8cfd-222a-42c4-8b88-11af80d19ca9",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\"]",
+        "ordering": 0
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "58a3290b-bc9c-4470-ad9c-4af3e5e527c9",
+    "pk": "3a4c2d4f-428d-4bce-9482-ebf499f847e2",
     "fields": {
-        "element": "d1820806-9f2b-4e10-9fd7-cc38a92bc603",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\"]",
-        "ordering": 1
+        "element": "f0562a35-05e2-4861-8deb-f553ea740479",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\", \"50fe8cfd-222a-42c4-8b88-11af80d19ca9\"]",
+        "ordering": 2
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "5c739ced-b26b-4eeb-bc14-e0a1584d84ec",
+    "pk": "3c13b16c-5460-4c46-939d-42d59bb312f3",
     "fields": {
-        "element": "f037604e-1ed6-49a6-97fd-d1926479290b",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\"]",
-        "ordering": 2
+        "element": "aa4dfa2c-2f68-4f8b-8d58-358ace1ade4e",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\", \"50fe8cfd-222a-42c4-8b88-11af80d19ca9\", \"f645b44c-52c8-449e-b73b-ebedc044729a\"]",
+        "ordering": 0
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "66e03ca8-222d-4220-94fe-57b038c764a6",
+    "pk": "43c02669-4689-4eb9-adbb-6857172e5393",
     "fields": {
-        "element": "03db6182-c24c-4b56-8e99-04706ceca550",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\"]",
-        "ordering": 2
+        "element": "07b1468e-96ac-4418-9637-d9215e623836",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\", \"50fe8cfd-222a-42c4-8b88-11af80d19ca9\", \"0171957b-b3a1-45d3-bf3d-bd9879412d75\"]",
+        "ordering": 0
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "6b1a95ba-b0b9-49df-a872-c91e619e3377",
+    "pk": "462ee4b9-f948-4a77-8963-a357bc995e69",
     "fields": {
-        "element": "748b1670-efea-4992-8d65-689ce4736d19",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\", \"0221f848-d543-4a7e-9b32-f4bebbb91ee6\"]",
+        "element": "6559a60a-215a-4cc3-a96a-37dfe2740c2c",
+        "path": "[\"0d8822c0-f117-48c0-b07a-3539773d1fcb\"]",
         "ordering": 0
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "77438d36-96b0-4e87-96b0-3b8f32e65ca8",
+    "pk": "4afedad3-41ea-4f15-849d-b4d3d65a9c2f",
     "fields": {
-        "element": "7aa6f286-eb0c-4d97-bcf2-1905c5be5cbe",
-        "path": "[\"42134c45-6acd-4f77-9dd5-0e82481c6495\", \"7e8a8e54-c419-4b7b-8b22-deb0cadef2c1\"]",
+        "element": "197c9ef2-f3f7-401a-bbe0-ce89c334f6a8",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\", \"50fe8cfd-222a-42c4-8b88-11af80d19ca9\", \"38a16c2d-c3d2-4e50-85f0-bf862ada16a0\"]",
         "ordering": 0
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "7d808740-31bb-4487-8efb-43033521a68a",
+    "pk": "4d422e57-86be-43ee-aa1e-c6f0ebf4e4f3",
     "fields": {
-        "element": "05e48dee-f9c3-47f3-8469-12564999fa54",
-        "path": "[\"31e583fa-87c3-4373-ac24-a5b8003c324a\", \"dcf54664-f834-4974-bf28-c28ec10e5b87\", \"3f4eb943-a13c-4295-b063-481bd488de62\"]",
-        "ordering": 0
+        "element": "2cd72d10-912c-4d77-bf5a-dccb44ce215d",
+        "path": "[\"735e4fce-d2f8-4859-90da-4adb494d6e07\", \"50fe8cfd-222a-42c4-8b88-11af80d19ca9\", \"80c7cb92-a19a-49ff-acb0-e05ec4daeeac\"]",
+        "ordering": 1
     }
 },
 {
     "model": "documents.elementpath",
-    "pk": "7f21ee7a-eda4-4b22-a171-c8b2f5288d2e",
+    "pk": "5aa9c701-b476-417d-9364-ec3acf177d88",
     "fields": {
-        "element": "f0ebf92f-b3a0-44dc-86e5-91932052c1a5",
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+        "updated": "2019-03-08T15:10:28.007Z",
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 },
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         "type": "page",
         "name": "Volume 1, page 2r",
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@@ -468,7 +468,7 @@
 },
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@@ -479,7 +479,7 @@
 },
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@@ -490,29 +490,29 @@
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@@ -523,15 +523,15 @@
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@@ -539,23 +539,23 @@
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@@ -563,7 +563,7 @@
 },
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@@ -573,109 +573,109 @@
 },
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@@ -685,17 +685,17 @@
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         "url": "http://server",
-        "created": "2019-02-21T11:18:37.512Z",
-        "updated": "2019-02-21T11:18:37.512Z",
+        "created": "2019-03-08T15:10:27.638Z",
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 },
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+        "created": "2019-03-08T15:10:27.644Z",
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@@ -705,12 +705,12 @@
 },
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@@ -718,12 +718,12 @@
 },
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@@ -731,12 +731,12 @@
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@@ -744,12 +744,12 @@
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@@ -757,12 +757,12 @@
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@@ -770,243 +770,1318 @@
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+        "content_type": 7,
+        "codename": "change_task"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 27,
+    "fields": {
+        "name": "Can delete task",
+        "content_type": 7,
+        "codename": "delete_task"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 28,
+    "fields": {
+        "name": "Can view task",
+        "content_type": 7,
+        "codename": "view_task"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 29,
+    "fields": {
+        "name": "Can add workflow",
+        "content_type": 8,
+        "codename": "add_workflow"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 30,
+    "fields": {
+        "name": "Can change workflow",
+        "content_type": 8,
+        "codename": "change_workflow"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 31,
+    "fields": {
+        "name": "Can delete workflow",
+        "content_type": 8,
+        "codename": "delete_workflow"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 32,
+    "fields": {
+        "name": "Can view workflow",
+        "content_type": 8,
+        "codename": "view_workflow"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 33,
+    "fields": {
+        "name": "Can add image",
+        "content_type": 9,
+        "codename": "add_image"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 34,
+    "fields": {
+        "name": "Can change image",
+        "content_type": 9,
+        "codename": "change_image"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 35,
+    "fields": {
+        "name": "Can delete image",
+        "content_type": 9,
+        "codename": "delete_image"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 36,
+    "fields": {
+        "name": "Can view image",
+        "content_type": 9,
+        "codename": "view_image"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 37,
+    "fields": {
+        "name": "Can add image server",
+        "content_type": 10,
+        "codename": "add_imageserver"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 38,
+    "fields": {
+        "name": "Can change image server",
+        "content_type": 10,
+        "codename": "change_imageserver"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 39,
+    "fields": {
+        "name": "Can delete image server",
+        "content_type": 10,
+        "codename": "delete_imageserver"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 40,
+    "fields": {
+        "name": "Can view image server",
+        "content_type": 10,
+        "codename": "view_imageserver"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 41,
+    "fields": {
+        "name": "Can add zone",
+        "content_type": 11,
+        "codename": "add_zone"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 42,
+    "fields": {
+        "name": "Can change zone",
+        "content_type": 11,
+        "codename": "change_zone"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 43,
+    "fields": {
+        "name": "Can delete zone",
+        "content_type": 11,
+        "codename": "delete_zone"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 44,
+    "fields": {
+        "name": "Can view zone",
+        "content_type": 11,
+        "codename": "view_zone"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 45,
+    "fields": {
+        "name": "Can add classification",
+        "content_type": 12,
+        "codename": "add_classification"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 46,
+    "fields": {
+        "name": "Can change classification",
+        "content_type": 12,
+        "codename": "change_classification"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 47,
+    "fields": {
+        "name": "Can delete classification",
+        "content_type": 12,
+        "codename": "delete_classification"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 48,
+    "fields": {
+        "name": "Can view classification",
+        "content_type": 12,
+        "codename": "view_classification"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 49,
+    "fields": {
+        "name": "Can add corpus",
+        "content_type": 13,
+        "codename": "add_corpus"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 50,
+    "fields": {
+        "name": "Can change corpus",
+        "content_type": 13,
+        "codename": "change_corpus"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 51,
+    "fields": {
+        "name": "Can delete corpus",
+        "content_type": 13,
+        "codename": "delete_corpus"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 52,
+    "fields": {
+        "name": "Can view corpus",
+        "content_type": 13,
+        "codename": "view_corpus"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 53,
+    "fields": {
+        "name": "Can add data source",
+        "content_type": 14,
+        "codename": "add_datasource"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 54,
+    "fields": {
+        "name": "Can change data source",
+        "content_type": 14,
+        "codename": "change_datasource"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 55,
+    "fields": {
+        "name": "Can delete data source",
+        "content_type": 14,
+        "codename": "delete_datasource"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 56,
+    "fields": {
+        "name": "Can view data source",
+        "content_type": 14,
+        "codename": "view_datasource"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 57,
+    "fields": {
+        "name": "Can add element",
+        "content_type": 15,
+        "codename": "add_element"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 58,
+    "fields": {
+        "name": "Can change element",
+        "content_type": 15,
+        "codename": "change_element"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 59,
+    "fields": {
+        "name": "Can delete element",
+        "content_type": 15,
+        "codename": "delete_element"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 60,
+    "fields": {
+        "name": "Can view element",
+        "content_type": 15,
+        "codename": "view_element"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 61,
+    "fields": {
+        "name": "Can add element path",
+        "content_type": 16,
+        "codename": "add_elementpath"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 62,
+    "fields": {
+        "name": "Can change element path",
+        "content_type": 16,
+        "codename": "change_elementpath"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 63,
+    "fields": {
+        "name": "Can delete element path",
+        "content_type": 16,
+        "codename": "delete_elementpath"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 64,
+    "fields": {
+        "name": "Can view element path",
+        "content_type": 16,
+        "codename": "view_elementpath"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 65,
+    "fields": {
+        "name": "Can add meta data",
+        "content_type": 17,
+        "codename": "add_metadata"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 66,
+    "fields": {
+        "name": "Can change meta data",
+        "content_type": 17,
+        "codename": "change_metadata"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 67,
+    "fields": {
+        "name": "Can delete meta data",
+        "content_type": 17,
+        "codename": "delete_metadata"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 68,
+    "fields": {
+        "name": "Can view meta data",
+        "content_type": 17,
+        "codename": "view_metadata"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 69,
+    "fields": {
+        "name": "Can add transcription",
+        "content_type": 18,
+        "codename": "add_transcription"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 70,
+    "fields": {
+        "name": "Can change transcription",
+        "content_type": 18,
+        "codename": "change_transcription"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 71,
+    "fields": {
+        "name": "Can delete transcription",
+        "content_type": 18,
+        "codename": "delete_transcription"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 72,
+    "fields": {
+        "name": "Can view transcription",
+        "content_type": 18,
+        "codename": "view_transcription"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 73,
+    "fields": {
+        "name": "Can add act",
+        "content_type": 19,
+        "codename": "add_act"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 74,
+    "fields": {
+        "name": "Can change act",
+        "content_type": 19,
+        "codename": "change_act"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 75,
+    "fields": {
+        "name": "Can delete act",
+        "content_type": 19,
+        "codename": "delete_act"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 76,
+    "fields": {
+        "name": "Can view act",
+        "content_type": 19,
+        "codename": "view_act"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 77,
+    "fields": {
+        "name": "Can add page",
+        "content_type": 20,
+        "codename": "add_page"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 78,
+    "fields": {
+        "name": "Can change page",
+        "content_type": 20,
+        "codename": "change_page"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 79,
+    "fields": {
+        "name": "Can delete page",
+        "content_type": 20,
+        "codename": "delete_page"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 80,
+    "fields": {
+        "name": "Can view page",
+        "content_type": 20,
+        "codename": "view_page"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 81,
+    "fields": {
+        "name": "Can add user",
+        "content_type": 21,
+        "codename": "add_user"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 82,
+    "fields": {
+        "name": "Can change user",
+        "content_type": 21,
+        "codename": "change_user"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 83,
+    "fields": {
+        "name": "Can delete user",
+        "content_type": 21,
+        "codename": "delete_user"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 84,
+    "fields": {
+        "name": "Can view user",
+        "content_type": 21,
+        "codename": "view_user"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 85,
+    "fields": {
+        "name": "Can add corpus right",
+        "content_type": 22,
+        "codename": "add_corpusright"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 86,
+    "fields": {
+        "name": "Can change corpus right",
+        "content_type": 22,
+        "codename": "change_corpusright"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 87,
+    "fields": {
+        "name": "Can delete corpus right",
+        "content_type": 22,
+        "codename": "delete_corpusright"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 88,
+    "fields": {
+        "name": "Can view corpus right",
+        "content_type": 22,
+        "codename": "view_corpusright"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 89,
+    "fields": {
+        "name": "Can add o auth credentials",
+        "content_type": 23,
+        "codename": "add_oauthcredentials"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 90,
+    "fields": {
+        "name": "Can change o auth credentials",
+        "content_type": 23,
+        "codename": "change_oauthcredentials"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 91,
+    "fields": {
+        "name": "Can delete o auth credentials",
+        "content_type": 23,
+        "codename": "delete_oauthcredentials"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 92,
+    "fields": {
+        "name": "Can view o auth credentials",
+        "content_type": 23,
+        "codename": "view_oauthcredentials"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 93,
+    "fields": {
+        "name": "Can add data file",
+        "content_type": 24,
+        "codename": "add_datafile"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 94,
+    "fields": {
+        "name": "Can change data file",
+        "content_type": 24,
+        "codename": "change_datafile"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 95,
+    "fields": {
+        "name": "Can delete data file",
+        "content_type": 24,
+        "codename": "delete_datafile"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 96,
+    "fields": {
+        "name": "Can view data file",
+        "content_type": 24,
+        "codename": "view_datafile"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 97,
+    "fields": {
+        "name": "Can add data import",
+        "content_type": 25,
+        "codename": "add_dataimport"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 98,
+    "fields": {
+        "name": "Can change data import",
+        "content_type": 25,
+        "codename": "change_dataimport"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 99,
+    "fields": {
+        "name": "Can delete data import",
+        "content_type": 25,
+        "codename": "delete_dataimport"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 100,
+    "fields": {
+        "name": "Can view data import",
+        "content_type": 25,
+        "codename": "view_dataimport"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 101,
+    "fields": {
+        "name": "Can add data import failure",
+        "content_type": 26,
+        "codename": "add_dataimportfailure"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 102,
+    "fields": {
+        "name": "Can change data import failure",
+        "content_type": 26,
+        "codename": "change_dataimportfailure"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 103,
+    "fields": {
+        "name": "Can delete data import failure",
+        "content_type": 26,
+        "codename": "delete_dataimportfailure"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 104,
+    "fields": {
+        "name": "Can view data import failure",
+        "content_type": 26,
+        "codename": "view_dataimportfailure"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 105,
+    "fields": {
+        "name": "Can add event",
+        "content_type": 27,
+        "codename": "add_event"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 106,
+    "fields": {
+        "name": "Can change event",
+        "content_type": 27,
+        "codename": "change_event"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 107,
+    "fields": {
+        "name": "Can delete event",
+        "content_type": 27,
+        "codename": "delete_event"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 108,
+    "fields": {
+        "name": "Can view event",
+        "content_type": 27,
+        "codename": "view_event"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 109,
+    "fields": {
+        "name": "Can add repository",
+        "content_type": 28,
+        "codename": "add_repository"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 110,
+    "fields": {
+        "name": "Can change repository",
+        "content_type": 28,
+        "codename": "change_repository"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 111,
+    "fields": {
+        "name": "Can delete repository",
+        "content_type": 28,
+        "codename": "delete_repository"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 112,
+    "fields": {
+        "name": "Can view repository",
+        "content_type": 28,
+        "codename": "view_repository"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 113,
+    "fields": {
+        "name": "Can add revision",
+        "content_type": 29,
+        "codename": "add_revision"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 114,
+    "fields": {
+        "name": "Can change revision",
+        "content_type": 29,
+        "codename": "change_revision"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 115,
+    "fields": {
+        "name": "Can delete revision",
+        "content_type": 29,
+        "codename": "delete_revision"
+    }
+},
+{
+    "model": "auth.permission",
+    "pk": 116,
+    "fields": {
+        "name": "Can view revision",
+        "content_type": 29,
+        "codename": "view_revision"
+    }
+},
+{
+    "model": "auth.group",
+    "pk": 1,
+    "fields": {
+        "name": "Demo",
+        "permissions": []
+    }
+},
+{
+    "model": "auth.group",
+    "pk": 2,
+    "fields": {
+        "name": "Internal",
+        "permissions": []
+    }
+},
+{
+    "model": "users.user",
+    "pk": 1,
+    "fields": {
+        "password": "pbkdf2_sha256$120000$Dx98eTfRNicu$3Zc5hyU6e4vgpACjhqG1z6Ea1TZsiobMnYJ2kIqrhiM=",
+        "last_login": null,
+        "email": "root@root.fr",
+        "is_active": true,
+        "is_admin": true,
+        "verified_email": true,
+        "groups": []
+    }
+},
+{
+    "model": "users.user",
+    "pk": 2,
+    "fields": {
+        "password": "pbkdf2_sha256$120000$KXMjGSzVwS6Y$jbVZmaiV8cPAvlgI0EzSfc/1LFvOVbGv5zjmjJrDGC0=",
+        "last_login": null,
+        "email": "user@user.fr",
+        "is_active": true,
+        "is_admin": false,
+        "verified_email": true,
+        "groups": []
+    }
+},
+{
+    "model": "users.user",
+    "pk": 3,
+    "fields": {
+        "password": "!18RAuzZnNjjVddPXK2jDVG19prOBwQaxEgG0SZam",
+        "last_login": null,
+        "email": "demo@demo.fr",
+        "is_active": true,
+        "is_admin": false,
+        "verified_email": false,
+        "groups": [
+            1
+        ]
     }
 },
 {
     "model": "users.oauthcredentials",
-    "pk": "434edb7d-46e2-42f8-80a9-de2a16958c4f",
+    "pk": "656059a3-e70c-46b5-b2a0-bb4d34794df7",
     "fields": {
         "user": 2,
         "provider_name": "gitlab",
@@ -1023,7 +2098,7 @@
     "pk": 1,
     "fields": {
         "user": 2,
-        "corpus": "6a3dfb5d-8c4a-4212-8839-10a4c75e9f5f",
+        "corpus": "ad8b0559-7d92-4634-a9d1-557a473a5b05",
         "can_write": true,
         "can_admin": true
     }
diff --git a/arkindex/documents/management/commands/build_fixtures.py b/arkindex/documents/management/commands/build_fixtures.py
index 47d86c4669f135ccfb8790e693cf84ab2b5decc3..870131e4109b869d234911a6ca481801246a9491 100644
--- a/arkindex/documents/management/commands/build_fixtures.py
+++ b/arkindex/documents/management/commands/build_fixtures.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 from django.core.management.base import BaseCommand
+from django.contrib.auth.models import Group
 from arkindex_common.ml_tool import MLToolType
 from arkindex.documents.models import (
     Corpus, Element, ElementType, Page, PageDirection, PageType, Act,
@@ -39,9 +40,20 @@ class Command(BaseCommand):
         z5 = makezone(img5, 0, 1000)
         z6 = makezone(img6, 0, 1000)
 
-        # Create an admin and a user
-        User.objects.create_superuser('root@root.fr', 'Pa$$w0rd')
+        # Create internal and demo user groups
+        Group.objects.create(id=1, name='Demo')
+        Group.objects.create(id=2, name='Internal')
+
+        # Create an admin, a user and a demo user
+        superuser = User.objects.create_superuser('root@root.fr', 'Pa$$w0rd')
+        superuser.verified_email = True
+        superuser.save()
+
         user = User.objects.create_user('user@user.fr', 'Pa$$w0rd')
+        user.verified_email = True
+        user.save()
+
+        User.objects.create_demo_user('demo@demo.fr')
 
         # Create 1 data source for transcriptions
         source = DataSource.objects.create(
diff --git a/arkindex/project/checks.py b/arkindex/project/checks.py
index 055f632ad6c6cbe07cf12b06b73d63986c0cf98f..3c9c42e808b98fe929b76ef2435bf6203b3cafa7 100644
--- a/arkindex/project/checks.py
+++ b/arkindex/project/checks.py
@@ -232,6 +232,30 @@ def internal_group_check(*args, **kwargs):
     return []
 
 
+@register()
+@only_runserver
+def demo_group_check(*args, **kwargs):
+    from django.conf import settings
+    from django.contrib.auth.models import Group
+    try:
+        group_id = settings.DEMO_GROUP_ID
+    except AttributeError:
+        return [Warning(
+            'Demo user group ID is not set; demo registration will fail.',
+            hint='settings.DEMO_GROUP_ID',
+            id='arkindex.W003',
+        )]
+    try:
+        Group.objects.get(id=group_id)
+    except Group.DoesNotExist:
+        return [Warning(
+            'Demo user group does not exist; demo registration will fail.',
+            hint='settings.DEMO_GROUP_ID = "{}"'.format(group_id),
+            id='arkindex.W004',
+        )]
+    return []
+
+
 @register()
 @only_runserver
 def gitlab_oauth_check(*args, **kwargs):
diff --git a/arkindex/project/permissions.py b/arkindex/project/permissions.py
index 01dedbdad0132eb55635162de1f3541bfbbcd041..6c2cbc512bf9b6f3d5e741099b1f9154dd58cbc9 100644
--- a/arkindex/project/permissions.py
+++ b/arkindex/project/permissions.py
@@ -2,7 +2,7 @@ from django.conf import settings
 from rest_framework import permissions
 
 
-class GroupPermissionMixin(object):
+class InternalGroupPermissionMixin(object):
 
     def has_permission(self, request, view):
         if request.user.is_authenticated and not request.user.is_admin:
@@ -18,17 +18,37 @@ class GroupPermissionMixin(object):
         return super().has_permission(request, view)
 
 
-class AllowAny(GroupPermissionMixin, permissions.AllowAny):
+class DemoGroupPermissionMixin(object):
+
+    def has_permission(self, request, view):
+        if request.user.is_authenticated and not request.user.is_admin:
+            # If the user has registered from the demo, or has an unverified email,
+            # only allow HEAD, GET and OPTIONS.
+            if not request.user.verified_email or request.user.is_demo:
+                return super().has_permission(request, view) and request.method in permissions.SAFE_METHODS
+
+        return super().has_permission(request, view)
+
+
+class AllowAny(InternalGroupPermissionMixin, permissions.AllowAny):
+    pass
+
+
+class IsAuthenticated(InternalGroupPermissionMixin, permissions.IsAuthenticated):
+    pass
+
+
+class IsAuthenticatedOrReadOnly(InternalGroupPermissionMixin, permissions.IsAuthenticatedOrReadOnly):
     pass
 
 
-class IsAuthenticated(GroupPermissionMixin, permissions.IsAuthenticated):
+class IsAdminUser(InternalGroupPermissionMixin, permissions.IsAdminUser):
     pass
 
 
-class IsAuthenticatedOrReadOnly(GroupPermissionMixin, permissions.IsAuthenticatedOrReadOnly):
+class IsVerified(DemoGroupPermissionMixin, IsAuthenticated):
     pass
 
 
-class IsAdminUser(GroupPermissionMixin, permissions.IsAdminUser):
+class IsVerifiedOrReadOnly(DemoGroupPermissionMixin, IsAuthenticatedOrReadOnly):
     pass
diff --git a/arkindex/project/settings.py b/arkindex/project/settings.py
index aa6a93ac7b3a7c646440f216f5e589dd318124c1..6116c3b07b870cdeed2bb351ef3873ada9bd6582 100644
--- a/arkindex/project/settings.py
+++ b/arkindex/project/settings.py
@@ -384,7 +384,8 @@ ML_DEFAULT_CLASSIFIER = 'tobacco'
 ML_DEFAULT_RECOGNIZER = 'tesseract'
 
 # User groups with special permissions
-INTERNAL_GROUP_ID = 1
+DEMO_GROUP_ID = 1
+INTERNAL_GROUP_ID = 2
 
 # Optional unit tests runner with code coverage
 try:
diff --git a/arkindex/project/tests/test_checks.py b/arkindex/project/tests/test_checks.py
index c5d2b780491b59fd02a5cc94b59ea6d95e4dc1cb..0491e66d5fb5b9103d06440fe102bc37beae75c0 100644
--- a/arkindex/project/tests/test_checks.py
+++ b/arkindex/project/tests/test_checks.py
@@ -235,8 +235,6 @@ class ChecksTestCase(TestCase):
         from arkindex.project.checks import internal_group_check
         from django.contrib.auth.models import Group
 
-        self.assertEqual(Group.objects.count(), 0)
-
         del settings.INTERNAL_GROUP_ID
         self.assertListEqual(internal_group_check(), [Warning(
             'Internal group ID is not set; internal API requests will fail.',
@@ -251,10 +249,31 @@ class ChecksTestCase(TestCase):
             id='arkindex.W002',
         )])
 
-        g = Group.objects.create()
-        settings.INTERNAL_GROUP_ID = g.id
+        Group.objects.create(id=1234)
         self.assertListEqual(internal_group_check(), [])
 
+    @override_settings()
+    def test_demo_group_check(self):
+        from arkindex.project.checks import demo_group_check
+        from django.contrib.auth.models import Group
+
+        del settings.DEMO_GROUP_ID
+        self.assertListEqual(demo_group_check(), [Warning(
+            'Demo user group ID is not set; demo registration will fail.',
+            hint='settings.DEMO_GROUP_ID',
+            id='arkindex.W003',
+        )])
+
+        settings.DEMO_GROUP_ID = 1234
+        self.assertListEqual(demo_group_check(), [Warning(
+            'Demo user group does not exist; demo registration will fail.',
+            hint='settings.DEMO_GROUP_ID = "1234"',
+            id='arkindex.W004',
+        )])
+
+        Group.objects.create(id=1234)
+        self.assertListEqual(demo_group_check(), [])
+
     @override_settings()
     def test_gitlab_oauth_check(self):
         from arkindex.project.checks import gitlab_oauth_check
diff --git a/arkindex/users/api.py b/arkindex/users/api.py
index 086cc958b6d351095345fea8a70be0ab45744b65..0066ef2dbc5897596176c6a92f128eafa9d75943 100644
--- a/arkindex/users/api.py
+++ b/arkindex/users/api.py
@@ -3,7 +3,6 @@ from django.core.mail import send_mail
 from django.contrib.auth import login, logout
 from django.contrib.auth.tokens import default_token_generator
 from django.contrib.auth.mixins import LoginRequiredMixin
-from django.contrib.auth.models import Group
 from django.contrib.auth.forms import PasswordResetForm
 from django.views.generic import RedirectView
 from django.template.loader import render_to_string
@@ -14,13 +13,13 @@ from rest_framework.generics import \
     ListAPIView, RetrieveAPIView, RetrieveDestroyAPIView, RetrieveUpdateDestroyAPIView, CreateAPIView
 from rest_framework.response import Response
 from rest_framework.exceptions import AuthenticationFailed, ValidationError
-from arkindex.project.permissions import IsAuthenticated
+from arkindex.project.permissions import IsAuthenticated, IsVerified
 from arkindex.documents.models import Corpus, Element, ElementType
 from arkindex.users.providers import oauth_providers, get_provider
 from arkindex.users.models import User, OAuthStatus
 from arkindex.users.serializers import (
     OAuthCredentialsSerializer, OAuthProviderClassSerializer,
-    UserSerializer, NewUserSerializer, EmailLoginSerializer,
+    UserSerializer, NewDemoUserSerializer, EmailLoginSerializer,
     PasswordResetSerializer, PasswordResetConfirmSerializer,
 )
 import urllib.parse
@@ -30,7 +29,7 @@ logger = logging.getLogger(__name__)
 
 
 class ProvidersList(ListAPIView):
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = OAuthProviderClassSerializer
     pagination_class = None
 
@@ -39,7 +38,7 @@ class ProvidersList(ListAPIView):
 
 
 class CredentialsList(ListAPIView):
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = OAuthCredentialsSerializer
 
     def get_queryset(self):
@@ -50,7 +49,7 @@ class CredentialsList(ListAPIView):
 
 
 class CredentialsRetrieve(RetrieveDestroyAPIView):
-    permission_classes = (IsAuthenticated, )
+    permission_classes = (IsVerified, )
     serializer_class = OAuthCredentialsSerializer
 
     def get_queryset(self):
@@ -68,17 +67,25 @@ class UserRetrieve(RetrieveUpdateDestroyAPIView):
     def get_object(self):
         return self.request.user
 
+    def check_permissions(self, request):
+        # Will raise REST framework exceptions for denied requests
+        super().check_permissions(request)
+
+        # Deny changing the password on demo users without verified emails
+        if request.method.lower() in ('put', 'patch') and \
+                request.user.is_demo and \
+                not request.user.is_verified:
+            self.permission_denied(request)
+
     def perform_destroy(self, instance):
         logout(self.request)
 
 
 class UserCreate(CreateAPIView):
-    serializer_class = NewUserSerializer
+    serializer_class = NewDemoUserSerializer
 
     def perform_create(self, serializer):
         user = serializer.save()
-        demo_group, _ = Group.objects.get_or_create(name="Demo")
-        user.groups.add(demo_group)
         login(self.request, user)
 
         corpus = Corpus.objects.create(name=user.email)
@@ -195,6 +202,7 @@ class OAuthSignIn(APIView):
     """
     Start an OAuth authentication workflow
     """
+    permission_classes = (IsVerified, )
 
     def get(self, *args, **kwargs):
         if 'provider' not in kwargs:
@@ -225,6 +233,7 @@ class OAuthRetry(RetrieveAPIView):
     """
     Restart an OAuth authentication workflow for existing credentials
     """
+    permission_classes = (IsVerified, )
 
     def get_queryset(self):
         return self.request.user.credentials
@@ -246,6 +255,7 @@ class OAuthCallback(LoginRequiredMixin, RedirectView):
     """
     Callback for OAuth responses
     """
+    permission_classes = (IsVerified, )
 
     pattern_name = 'credentials'
 
diff --git a/arkindex/users/managers.py b/arkindex/users/managers.py
index c801afbab831f6c6df0d09bffc8eecdd0ae3f9dc..28c144bfaa05972b626530bf0a1eaadaa4d9e770 100644
--- a/arkindex/users/managers.py
+++ b/arkindex/users/managers.py
@@ -1,4 +1,5 @@
-from django.contrib.auth.models import BaseUserManager
+from django.conf import settings
+from django.contrib.auth.models import BaseUserManager, Group
 
 
 class UserManager(BaseUserManager):
@@ -28,3 +29,11 @@ class UserManager(BaseUserManager):
         user.is_admin = True
         user.save(using=self._db)
         return user
+
+    def create_demo_user(self, email):
+        user = self.create_user(email)
+        user.groups.add(Group.objects.get(id=settings.DEMO_GROUP_ID))
+        if user.auth_token:
+            # Do not set a token for demo users
+            user.auth_token.delete()
+        return user
diff --git a/arkindex/users/migrations/0002_default_groups.py b/arkindex/users/migrations/0002_default_groups.py
new file mode 100644
index 0000000000000000000000000000000000000000..2ad11e641e7f6a2539c9dbd0086b8fe813df5e80
--- /dev/null
+++ b/arkindex/users/migrations/0002_default_groups.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.1 on 2019-03-08 15:11
+
+from django.db import migrations
+
+
+def create_groups(apps, schema_editor):
+    """
+    Create the default user groups, used for permission checking
+    """
+    Group = apps.get_model('auth', 'Group')
+    Group.objects.get_or_create(id=1, name='Demo')
+    Group.objects.create(id=2, name='Internal')
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RunPython(create_groups),
+    ]
diff --git a/arkindex/users/models.py b/arkindex/users/models.py
index b4fdefd118358fe34ab92e21601c22e63b750c05..cf45ae709d3892ad56d3f7b9f18019ab2c7c5b5f 100644
--- a/arkindex/users/models.py
+++ b/arkindex/users/models.py
@@ -52,6 +52,10 @@ class User(AbstractBaseUser):
     def is_internal(self):
         return self.groups.filter(id=settings.INTERNAL_GROUP_ID).exists()
 
+    @property
+    def is_demo(self):
+        return self.groups.filter(id=settings.DEMO_GROUP_ID).exists()
+
 
 class OAuthStatus(Enum):
     Created = 'created'
diff --git a/arkindex/users/serializers.py b/arkindex/users/serializers.py
index 45b078586d9a6677698e3c915b46768f360ef16c..27b8b94b83488e48c8b550a83d5e33723f3daf71 100644
--- a/arkindex/users/serializers.py
+++ b/arkindex/users/serializers.py
@@ -54,7 +54,7 @@ class UserSerializer(serializers.ModelSerializer):
         return super().update(instance, validated_data)
 
 
-class NewUserSerializer(serializers.ModelSerializer):
+class NewDemoUserSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = User
@@ -63,7 +63,7 @@ class NewUserSerializer(serializers.ModelSerializer):
         )
 
     def create(self, validated_data):
-        return User.objects.create_user(validated_data['email'])
+        return User.objects.create_demo_user(validated_data['email'])
 
 
 class EmailLoginSerializer(serializers.Serializer):
diff --git a/arkindex/users/tests/test_registration.py b/arkindex/users/tests/test_registration.py
index 61ac1e30b0468433df0f48e61481f678844a8350..5f2bfbc5ba66c6ae7551156b2b64ea965d3754d0 100644
--- a/arkindex/users/tests/test_registration.py
+++ b/arkindex/users/tests/test_registration.py
@@ -1,14 +1,14 @@
-from rest_framework.test import APITestCase
 from rest_framework import status
 from django.urls import reverse
 from django.core import mail
 from django.contrib import auth
 from django.contrib.auth.tokens import default_token_generator
+from arkindex.project.tests import FixtureAPITestCase
 from arkindex.users.models import User
 import urllib.parse
 
 
-class TestRegistration(APITestCase):
+class TestRegistration(FixtureAPITestCase):
 
     @classmethod
     def setUpTestData(cls):