diff --git a/django/notice/consumers.py b/django/notice/consumers.py
index 9ab38da..7b2b530 100644
--- a/django/notice/consumers.py
+++ b/django/notice/consumers.py
@@ -26,9 +26,10 @@ class NoticeManager:
                                            'user': ProfileSerializer(consumer.user.profilemodel).data})
 
     def remove(self, consumer: NoticeConsumer):
-        for friend in consumer.user.profilemodel.get_friends():
-            self.notify_user(friend.user, {'type': 'offline',
-                                           'user': ProfileSerializer(consumer.user.profilemodel).data})
+        if consumer.user.is_authenticated:
+            for friend in consumer.user.profilemodel.get_friends():
+                self.notify_user(friend.user, {'type': 'offline',
+                                               'user': ProfileSerializer(consumer.user.profilemodel).data})
         self._list.remove(consumer)
 
     def get_consumer_by_user(self, user: User):