Want to delete that embarrassing message you just sent? WhatsApp will let you, and so will Instagram— but if you're using Facebook, you're out of luck.

Unless you're Mark Zuckerberg, the CEO and cofounder of the social-media giant.

TechCrunch reported Thursday that some old messages sent by Zuckerberg and senior executives had disappeared from recipients' Facebook Messenger inboxes, as proved by the original email receipts sent at the time.