diff --git a/nomen/notifications.py b/nomen/notifications.py
index 170967d..4f1d756 100644
--- a/nomen/notifications.py
+++ b/nomen/notifications.py
@@ -42,6 +42,10 @@ async def in_thread(member, thread):
 
 
 async def can_view(ctx, member) -> bool:
+    # Nonexistent members cannot view
+    if member is None:
+        return False
+
     if ctx.channel.type == ChannelType.private_thread and not await in_thread(member, ctx.channel):
         return False