diff --git a/apps/hadis/serializers/hadis.py b/apps/hadis/serializers/hadis.py
index 207ae0e..200688d 100644
--- a/apps/hadis/serializers/hadis.py
+++ b/apps/hadis/serializers/hadis.py
@@ -181,7 +181,7 @@ class HadisSyncSerializer(serializers.ModelSerializer):
             layer = transmitter_rel.narrator_layer
             
             reliability_block = None
-            if t.reliability:
+            if t and t.reliability:
                 reliability_block = {
                     'id': t.reliability.id,
                     'title': get_localized_text(t.reliability.title, request),
@@ -189,12 +189,34 @@ class HadisSyncSerializer(serializers.ModelSerializer):
                     'main_color_code': t.reliability.main_color_code,
                 }
 
+            uncertain_list = []
+            if transmitter_rel.is_uncertain:
+                for ut in transmitter_rel.uncertain_transmitters.all():
+                    ut_rel_block = None
+                    if ut.reliability:
+                        ut_rel_block = {
+                            'id': ut.reliability.id,
+                            'title': get_localized_text(ut.reliability.title, request),
+                            'color': ut.reliability.color,
+                            'main_color_code': ut.reliability.main_color_code,
+                        }
+                    uncertain_list.append({
+                        'id': ut.id,
+                        'name': get_localized_text(ut.full_name, request),
+                        'slug': ut.slug,
+                        'known_as': get_localized_text(ut.known_as, request),
+                        'nickname': get_localized_text(ut.nickname, request),
+                        'birth_year_hijri': ut.birth_year_hijri,
+                        'death_year_hijri': ut.death_year_hijri,
+                        'reliability': ut_rel_block,
+                    })
+
             transmitters_data.append({
-                'id': t.id,
-                'name': get_localized_text(t.full_name, request),
-                'slug': t.slug,
-                'known_as': get_localized_text(t.known_as, request),
-                'nickname': get_localized_text(t.nickname, request),
+                'id': t.id if t else None,
+                'name': get_localized_text(t.full_name, request) if t else None,
+                'slug': t.slug if t else None,
+                'known_as': get_localized_text(t.known_as, request) if t else None,
+                'nickname': get_localized_text(t.nickname, request) if t else None,
                 'reliability': reliability_block,
                 'layer_id': layer.id if layer else None,
                 'narrator_layer_id': layer.id if layer else None,
@@ -202,8 +224,10 @@ class HadisSyncSerializer(serializers.ModelSerializer):
                 'layer_name': get_localized_text(layer.name, request) if layer else None,
                 'layer_description': get_localized_text(layer.description, request) if layer else None,
                 'is_gap': transmitter_rel.is_gap,
-                'birth_year_hijri': t.birth_year_hijri,
-                'death_year_hijri': t.death_year_hijri,
+                'is_uncertain': transmitter_rel.is_uncertain,
+                'uncertain_transmitters': uncertain_list,
+                'birth_year_hijri': t.birth_year_hijri if t else None,
+                'death_year_hijri': t.death_year_hijri if t else None,
                 'order': transmitter_rel.order,
             })
 
diff --git a/apps/hadis/views/hadis.py b/apps/hadis/views/hadis.py
index 4030a05..d12e86d 100644
--- a/apps/hadis/views/hadis.py
+++ b/apps/hadis/views/hadis.py
@@ -124,6 +124,9 @@ class HadisSyncView(ListAPIView):
                         'transmitter', 
                         'transmitter__reliability',  
                         'narrator_layer'
+                    ).prefetch_related(
+                        'uncertain_transmitters',
+                        'uncertain_transmitters__reliability'
                     ).order_by('order')
                 ),
                 Prefetch(