Why wouldn't you just give him your name if you did nothing wrong? And he's actually right. If the for sale signs are up, you have to honor the sale. for instance, if a $100 pair of jeans is on a rack that has a 'all items $19.99' sign on it, but the jeans still contain a $100 price tag, the store must honor the price advertised on top of the rack. The customer was not right. He said that the sale sign clearly stated the dates in the fine print, so it was not 'false advertising'.