At first, all of the collection notices will go to the scammer's address. But once the creditors realize that Roy isn't going to pay and that they're not hearing from him, they'll start using their magical voodoo to pull up address reports and other information on him. His social security number will reveal his current address in New Mexico and probably his real phone number, which is where they'll start focusing their collections at. It may take a month or three, but the victim will always start getting the collection notices eventually.