Although Facebook has a file of every activity on it, anyone who has deleted something can not retrieve it. Once deleted it is officially moved from view but if one only "hid" the activity from their timeline then clicking on the "activity" link can enable one to unhide what was hidden from timeline.
how do you get back your deleted face book friends
Currently, you cannot recover a deleted post.
Thank me later.. cheers mate
just add them again
You don't. It's gone.
You can just search for the deleted application on the search box and then allow it again but you cannot recover deleted application or your saved data or game.
How to Recover Deleted Facebook Messages red this setap http://www.reseausale.com/2014/03/how-to-recover-deleted-facebook-messages.html
You can't. When you delete it it's gone forever
There are many ways to recover a Facebook account. One way is to use the "Find Account" tool on the Facebook Help Center. However, this tool doesn't allow you to recover your account if the email associated with your account has been changed or deleted. Another way to recover your Facebook. help Whatsapp+15672444720
Once a post is deleted, it is not possible to recover it. Always be careful not to delete items you still need. However, if the post is important to an official investigation, authorities may be able to recover the post from the company records.
Unfortunately, once notification is deleted on Facebook, it is gone forever. The only exception to this is if the user has archived the information, rather than deleting it. In that case, it would still be accessible under the message tab.
There has to be a technical way to do this w/o facebook's help (i.e. changing the URL)