So I have a customer that owes me money from last season. They have not paid for the last 3 months we did their lawn. However, I do have their credit card # on file from where they did pay me during the season. Does anyone know the rule to charging this card if I have the #? I'm assuming that I would have to have their permission, but it would be the easiest way to get the $ from them since I have sent them to collections and they have not paid me.