Ok, I got one: I had a lady come in with a return yesterday, and she hands me her 'reciept'- which is half a sheet of computer paper with a black and white photocopy of a reciept on it. (for reference, our reciepts have some red on them.) So, I politely tell her I'm not allowed to do this return, becuase the reciept is a photocopy. And she says... "That's not a copy."
.... I had no idea how to respond to that. I cannot fathom the stupidity needed to believe that this was a) an original reciept, or b) that any cashier would be stupid enough to not notice that this was a photocopy- I mean, it wasn't even cut down to a reciept width. You could see the fuzzy black areas along the sides that turn up when you make a cheap photocopy of something small.
Once my brain recovered from that, I told her that I'm sorry, but this was indeed a copy, so I couldn't do it. Then she wanted to know why. ...Oh-kay... I explain the whole thing about multiple copies for theft and stores won't take copies for security. So then... she wants the manager.
Lucky for me, the top-o-the-chain store manager had just come in, so I called her up and she told the lady we can't do a regular return, but we'd be happy to give store credit (which is what we do for no reciept, no biggie.) She packs up and leaves in a huff. (We did find out that she'd apparently bought a big frame for a friend, who gave her the photocopy when she asked for the reciept back to do her return.)
Ya know what the kicker was? The return was for.... one 8x10 mat. Price about $2.99. People really confuse me sometimes.