diff --git a/base/messages.py b/base/messages.py
index 998a5b2..38c345d 100644
--- a/base/messages.py
+++ b/base/messages.py
@@ -74,7 +74,8 @@ ERROR_CODE = {
     "2041": "Article with given id doesn't exist.",
     "2042": "Article Card with given id doesn't exist.",
     "2043": "Article Survey with given id doesn't exist.",
-    "2044": "Task does not exist"
+    "2044": "Task does not exist",
+    "2045": "Invalid guardian"
 }
 """Success message code"""
 SUCCESS_CODE = {
diff --git a/junior/views.py b/junior/views.py
index 9217a0d..d67dfde 100644
--- a/junior/views.py
+++ b/junior/views.py
@@ -113,10 +113,12 @@ class JuniorListAPIView(viewsets.ModelViewSet):
         # requests.get('https://dev-api.zodqaapp.com/api/v1/top-junior/', headers=headers_token)
         guardian_data = Guardian.objects.filter(user__email=request.user).last()
         # fetch junior object
-        queryset = Junior.objects.filter(guardian_code__icontains=str(guardian_data.guardian_code))
-        # use JuniorDetailListSerializer serializer
-        serializer = JuniorDetailListSerializer(queryset, many=True)
-        return custom_response(None, serializer.data, response_status=status.HTTP_200_OK)
+        if guardian_data:
+            queryset = Junior.objects.filter(guardian_code__icontains=str(guardian_data.guardian_code))
+            # use JuniorDetailListSerializer serializer
+            serializer = JuniorDetailListSerializer(queryset, many=True)
+            return custom_response(None, serializer.data, response_status=status.HTTP_200_OK)
+        return custom_error_response(ERROR_CODE['2045'], response_status=status.HTTP_200_OK)
 
 class AddJuniorAPIView(viewsets.ModelViewSet):
     """Add Junior by guardian"""