I think that title is kind of tricky or may sound weird. Here’s an example:
I download an image, and send it to a contact. Sadly, I sent the wrong image, and I can’t get it back nor ask for the contact to delete it. What can I do?
The answer is very easy, and it’s something I discover by accident. You can actually delete an attachment in Facebook messages, here’s how.
To try it, I created another profile, and play with it. First, I’ll send a message to this account with an attached photo. After checking that I was able to go into the image, I’ll try to delete it.
You can’t delete a message in the New Facebook Messages, if you click the “X” at the end, the message is archived, that’s all. To delete the image, go into the message, click on Actions > Delete messages.
Now, select the message(s) you want to delete. The message itself, the text, won’t be deleted from the other account. But the attachment’s link won’t work; the other person will be redirected to https://www.facebook.com/home.
Note that I only tested this with 3 accounts, including my own. Mine with New Messages, the other two not. It worked perfectly. Nice trick.