Subway charged me sales tax on adding money to my sub club card, and then charges me tax on individual uses. That is double taxing on the same purchase. I contacted them, and they agreed that it was wrong. However, they never issued me a refund as they had said. I would think double-taxing on the same purchase is illegal. I am done with using their debit card. This, along with their cold cut sub, leaves a bad taste in my mouth!