MasterCard's Merchant Rules prohibit merchant's from requiring identification to process a credit card transactions on signed credit cards. After dining at IHOP I provided my MasterCard for payment and was asked for ID, which I declined. They asked for another form of payment as their "policy" required ID. I told them I had no other form of payment and was threatened with arrest for 'dine and dash' and 'theft of service.' Until my wife finally paid. Unacceptable, Merchant should know the rules.