...but in theory, mc/visa can prohibit them from continuing to take their cards. Note I said in theory. The odds of that happening are, of course, either none or non existant. It's the same as Capital One telling you that you don't need a card with emv chip since all merchants are required by visa (or mc) to accept any valid card. Right. Next time a kiosk refuses to perform a transacton, I'll be sure to report them. Wonder what will happen.