I just used the mousesavers discount code on a car rental from Dollar located inside the airport. I was amazed at the savings. It only gave me a reservation number but I didn't have to put down any money. My question is: Without putting any money down will they honor the reservation? Since it is such a good savings I want to make sure they will honor it. I just thought it was odd that they didn't ask for any type of payment. I'm very cautious when it comes to reservations---can't you tell? Or is this common when you rent a car---you don't pay until you get it??? I can't remember.