diff --git a/server/vbv_lernwelt/shop/views.py b/server/vbv_lernwelt/shop/views.py
index bac49c4d..6fe4ad73 100644
--- a/server/vbv_lernwelt/shop/views.py
+++ b/server/vbv_lernwelt/shop/views.py
@@ -5,6 +5,8 @@ from rest_framework.decorators import api_view, permission_classes
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
 
+from vbv_lernwelt.core.admin import User
+from vbv_lernwelt.course.models import CourseSessionUser, CourseSession
 from vbv_lernwelt.shop.models import (
     BillingAddress,
     CheckoutInformation,
@@ -75,9 +77,21 @@ def transaction_webhook(request):
     checkout_info.webhook_history.append(transaction)
     checkout_info.save(update_fields=["state", "webhook_history"])
 
-    if transaction_status == ["settled", "transmitted"]:
-        # FIXME create CSU
-        ...
+    if transaction_status in ["settled", "transmitted"]:
+        logger.info(
+            "Webhook: Create course session user", transaction_id=transaction_id
+        )
+
+        # FIXME make this "better"
+        cs_vv = CourseSession.objects.filter(
+            title="Versicherungsvermittler/-in"
+        ).first()
+
+        CourseSessionUser.objects.get_or_create(
+            course_session=cs_vv,
+            user=User.objects.get(id=checkout_info.user_id),
+            role=CourseSessionUser.Role.MEMBER,
+        )
 
     return JsonResponse({"status": "ok"})