...for all debts. Public and private. That phrase is on all of our paper currency. I also *thought* it was the law that businesses have to accept it... ...so why does Philadelphia have to pass a law outlawing "cashless stores"? I also thought the sign that many convenience store have posted over the years stating; "$100 bills not accepted" was also tachnically illegal...but maybe not. Okay, legal beagles, what say you?