diff --git a/scripts/telegram.coffee b/scripts/telegram.coffee
index 9cf91d4..f917437 100644
--- a/scripts/telegram.coffee
+++ b/scripts/telegram.coffee
@@ -88,7 +88,11 @@ module.exports = (robot) ->
         res.send res.random denied
         return
       res.send res.random ok
+    
       run_command "chat_add_user #{chat} #{user}", (reply) ->
         robot.logger.info "add user #{user} to chat #{chat}"
         robot.logger.info 'result: ' + reply
-        res.send res.random done
+        if (reply.split ' ')[-1..][0] is 'USER_NOT_MUTUAL_CONTACT'
+          res.send 'aah, non posso: ho bisogno del tuo contatto'
+        else
+          res.send res.random done