While I was working in a supermarket on the till I once contested a signature. This women's signature didn't match the one on the back of the card one bit. So I

While I was working in a supermarket on the till I once contested a signature. This women's signature didn't match the one on the back of the card one bit. So I said "Can you sign that again please", and she did, but it still didn't match. Then I said "these signatures don't match at all" and she got all shirty with me, at which point I decided I wasn't being paid enough to care and just put it through anyway.