this hasn't happened to me that I remember thankfully. It pays to be vigilant. Or maybe it's my charming face and attitude
but now that I think about it I'm always having trouble with the tellers at my bank and the cashiers just making dumb mistakes. I'll ask for 10's and they give me 20's.
It used to happen to my dad all the time though, but he was also a dumb ass and never kept receipts or even checked his bags and things and was always leaving the store without his purchase
btw --lol at the topic name. Remember: according to Carlin, if you allow yourself to be robbed by a person over 100 you deserved it.