It's quite legal to refuse cash as payment in the US. You can demand payment in ducks if you so choose, and no one can force you otherwise. Where folks get co

It's quite legal to refuse cash as payment in the US. You can demand payment in ducks if you so choose, and no one can force you otherwise. Where folks get confused is that it is a legal requirement for you to accept cash if I'm settling a debt with you. If you were to run up a $50 bill at the gas pump, then go in to pay with your $50 bill they'd be forced to accept it or let you walk. Trying to convince a cop of that may not be the easiest thing in the world though...