A friend of mine rented a car from a major rent a car company in July of last year at POP, and his credit card has not been charged as of yet. He gave his card and they swipe it. They even gave him a receipt stating that the rental was paid. Did he get a free rental? I told him to call the rental company, but he is afraid that they will charge him and then a few months from now, charge him again when someone picks up the error. Do you think he should just leave well enough alone. Will he picked up by immigration next time he comes into the country?