How to Retrieve Deleted Messages From Facebook Messenger: If you deleted a message on Facebook Messenger, and now you realize that was a mistake. A terrible mistake. If you truly deleted the conversation, there’s basically no way to retrieve it (on your end, at least). However, if you’re lucky, you may not have actually deleted it after all. Here’s how to find out
Step 1: Login your Facebook via PC web-browser like Safari, Google Chrome, etc. and navigate to Settings >> General >> Download a copy. See Also:
Step 2: Click on “Download a copy” button and click “Start My Archive” afterwards. Then you’ll receive an email to verify your Facebook identity. After that head for mail inbox and click on the given link to start downloading Archive file.