diff --git a/app/api/serializers/common.py b/app/api/serializers/common.py
index d1334b2c..0c6d5c42 100644
--- a/app/api/serializers/common.py
+++ b/app/api/serializers/common.py
@@ -63,7 +63,7 @@ class CommonModelSerializer(CommonBaseSerializer):
         }
 
         kb_model_name = self.Meta.model._meta.model_name
-        if getattr(item, 'kb_model_name'):
+        if getattr(item, 'kb_model_name', None):
 
             kb_model_name = item.kb_model_name
 
@@ -80,26 +80,31 @@ class CommonModelSerializer(CommonBaseSerializer):
         if getattr(self.Meta.model, 'save_model_history', True):
 
             history_app_label = self.Meta.model._meta.app_label
-            if getattr(item, 'history_app_label'):
+            if getattr(item, 'history_app_label', None):
 
                 history_app_label = item.history_app_label
 
 
             history_model_name = self.Meta.model._meta.model_name
-            if getattr(item, 'history_model_name'):
+            if getattr(item, 'history_model_name', None):
 
                 history_model_name = item.history_model_name
 
 
-            get_url['history'] = reverse(
-                "v2:_api_v2_model_history-list",
-                request = self._context['view'].request,
-                kwargs = {
-                    'app_label': history_app_label,
-                    'model_name': history_model_name,
-                    'model_id': item.pk
-                }
-            )
+            if(
+                history_app_label is not None
+                and history_model_name is not None
+            ):
+
+                get_url['history'] = reverse(
+                    "v2:_api_v2_model_history-list",
+                    request = self._context['view'].request,
+                    kwargs = {
+                        'app_label': history_app_label,
+                        'model_name': history_model_name,
+                        'model_id': item.pk
+                    }
+                )
 
 
         obj = getattr(item, 'get_url_kwargs_notes', None)
@@ -121,7 +126,7 @@ class CommonModelSerializer(CommonBaseSerializer):
 
             note_basename = app_namespace + '_api_v2_' + str(item._meta.verbose_name).lower().replace(' ', '_') + '_note'
 
-            if getattr(item, 'note_basename'):
+            if getattr(item, 'note_basename', None):
 
                 note_basename = app_namespace + item.note_basename
 
@@ -129,10 +134,12 @@ class CommonModelSerializer(CommonBaseSerializer):
 
                 note_basename = self.Meta.note_basename
 
-            get_url['notes'] = reverse(
-                "v2:" + note_basename + "-list",
-                request = self._context['view'].request,
-                kwargs = item.get_url_kwargs_notes()
-            )
+            if getattr(item, 'get_url_kwargs_notes', None):
+
+                get_url['notes'] = reverse(
+                    "v2:" + note_basename + "-list",
+                    request = self._context['view'].request,
+                    kwargs = item.get_url_kwargs_notes()
+                )
 
         return get_url