diff --git a/gregsite/settings/base.py b/gregsite/settings/base.py
index 2fe6af2a7573e215c46d9490916eedecd909c4ea..a15cdab4f732c6ede746abdc720c9d843a88f956 100644
--- a/gregsite/settings/base.py
+++ b/gregsite/settings/base.py
@@ -330,3 +330,7 @@ NOTIFIER_LIMIT = 7
 # Default schedule for the task notifying about ending roles. Used by the management
 # command that triggers the task.
 NOTIFIER_SCHEDULE_TYPE = "W"
+
+# Source used when creating identities that do not have a clear source like
+# feide/id-porten
+DEFAULT_IDENTITY_SOURCE = "greg"
diff --git a/gregui/api/serializers/guest.py b/gregui/api/serializers/guest.py
index 255ddf637ce4ad2937d8bbf91654fbb6b6d863ad..cf4797dc4bac340d658cb3fe88c853f7970bf24e 100644
--- a/gregui/api/serializers/guest.py
+++ b/gregui/api/serializers/guest.py
@@ -1,5 +1,6 @@
 import datetime
 
+from django.conf import settings
 from django.utils.timezone import now
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
@@ -156,6 +157,7 @@ def create_identity_or_update(
         Identity.objects.create(
             person=person,
             type=identity_type,
+            source=settings.DEFAULT_IDENTITY_SOURCE,
             value=value,
         )
     else:
diff --git a/gregui/api/serializers/invitation.py b/gregui/api/serializers/invitation.py
index 18aa892677febf3360f76e90bdd1e70460ed2dca..2c95a82fd0c6a9eb6be59f2b1b08a1fd5ffb1dbf 100644
--- a/gregui/api/serializers/invitation.py
+++ b/gregui/api/serializers/invitation.py
@@ -1,5 +1,6 @@
 import datetime
 
+from django.conf import settings
 from django.db import transaction
 from django.utils import timezone
 from rest_framework import serializers
@@ -27,7 +28,7 @@ class InviteGuestSerializer(serializers.ModelSerializer):
                 person=person,
                 type=Identity.IdentityType.PRIVATE_EMAIL,
                 value=email,
-                source="greg",
+                source=settings.DEFAULT_IDENTITY_SOURCE,
             )
             role_data["person"] = person
             role_data["sponsor"] = user.sponsor