We will be a party of 6 on our next vacation and I think we are going to do the DDP. My question is this, if we decide to leave our tip in cash how will they know if we leave the right amount. I would think since we are auto tip it would have to be paid right to the waiter and not left on the table. We would always tip whatever we were susposed to but I just wondered if everyone would or just how it worked. I know they will have the 18 & 20% figured out for you on the receipt but I just wondered if everyone was honest. What does everyone think they will do? I'm just a little nervous about getting charged wrong.