Their is No reason a sign saying "No debit or credit" can't be put up at the begging of the drive through.It is not in an way reasonable to make people wait in a line up of 20 plus vehicle in a drive through only to get to the speaker saying their is No debit or credit. Then have to wait for another 5-6 vehicles to get served before you can leave the drive through without your order. Their is No reason at all why a sign couldn't be put on up before the drive through to save people the time of waiting 15-20 before work for nothing.