https://qz.com/1246799/facebook-will-reportedly-introduce-an-unsend-option-for-messages/

Facebook will introduce an “unsend” button in Messenger, which would let a user erase an unwanted message from their recipient’s inbox, as well as their own, TechCrunch reported April 6. The development immediately follows backlash against the company that it deleted messages its CEO Mark Zuckerberg sent in the past to people with whom he was communicating on Messenger.

TechCrunch wrote yesterday that several sources said that Zuckerberg’s old messages to them disappeared from their inboxes. Facebook confirmed the retractions, claiming it was done for the company’s security, following the Sony email hack in 2014. But Facebook informed neither the recipients nor the public that it was taking these steps.