diff --git a/api/views.py b/api/views.py
index 012b360..0870262 100644
--- a/api/views.py
+++ b/api/views.py
@@ -103,24 +103,30 @@ class CreateTemporaryUserView(generics.CreateAPIView):
         firstname = request.data.get("firstname")
         lastname = request.data.get("lastname")
 
-        if TemporaryUser.objects.filter(t_mobile=mobile).exists():
+        if (
+            TemporaryUser.objects.filter(t_mobile=mobile).exists()
+            or User.objects.filter(mobile=mobile).exists()
+        ):
             return Response({"message": ErrorMessages.MOBILE_EXISTS}, status=400)
-
-        if TemporaryUser.objects.filter(t_username=username).exists():
+        if (
+            TemporaryUser.objects.filter(t_username=username).exists()
+            or User.objects.filter(username=username).exists()
+        ):
             return Response({"message": ErrorMessages.USERNAME_EXISTS}, status=400)
-
-        if TemporaryUser.objects.filter(t_id_card=id_card).exists():
+        if (
+            TemporaryUser.objects.filter(t_id_card=id_card).exists()
+            or User.objects.filter(id_card=id_card).exists()
+        ):
+            return Response({"message": "ID card already exists."}, status=400)
+        if (
+            TemporaryUser.objects.filter(t_id_card=id_card).exists()
+            or User.objects.filter(id_card=id_card).exists()
+        ):
             return Response({"message": ErrorMessages.ID_CARD_EXISTS}, status=400)
-
         if id_card and not re.match(ID_CARD_PATTERN, id_card):
             return Response({"message": ErrorMessages.INVALID_ID_CARD}, status=400)
-
-        if TemporaryUser.objects.filter(t_id_card=id_card).exists():
-            return Response({"message": "ID card already exists."}, status=400)
-
         if mobile is None or not re.match(MOBILE_PATTERN, mobile):
             return Response({"message": ErrorMessages.INVALID_MOBILE}, status=400)
-
         if acc_no is None or not re.match(ACCOUNT_NUMBER_PATTERN, acc_no):
             return Response({"message": ErrorMessages.INVALID_ACCOUNT}, status=400)