Q&A for How to Delete Messages on Facebook Messenger

You cannot edit a sent message. Just send another one to correct the mistake.

Visit the profile of that person, hover your mouse pointer over the friend button. Then, uncheck the get notifications tab.

You can only delete your copy of a message one by one, or one entire conversation at once.

You cannot retrieve a message on Facebook Messenger, you can only delete your own copy of the message, which does not undo sending the message.

Go to the person's timeline and scroll to your post, then click on a small arrow pointing down at the top right corner, and click "remove post."

If you open your Facebook messages page, there will be a gear icon to the right of each message. Click on that gear icon and select "Delete" to delete a message without opening it first.

Hold down the conversation that the request is from, and an option should pop up to delete the conversation.

Delete your account, then uninstall it. Delete all your conversations with people and remove them from your contact list, then press your profile picture to take you to your account base and delete your account.