I see this quite regularly on my newsfeed, a picture of say a bank card with a caption like 'found this in Tesco today, if anyone knows a Michaela O'Neill will you tag her! Share and let's get this back to its owner!' Ok so that's well intentioned but why not hand the card into the shop where the person lost it/police/bank? I have sometimes thought about asking but don't want to be rude 