The present invention relates to a messaging system configured to: receive a request to generate a message at a first client device; cause display of a message notification within an interface of a second client device, wherein the message was addressed to a recipient of the second client device; receive a request to un-send the message from the first client device; and remove the message notification from the interface at the second client device in response to the request to un-send the message, according to some example embodiments.