They caught a guy here in Australia not long ago, who claimed to be a WW2 vet who worked behind enemy lines, was captured, tortured and survived Japanese death camps. He was uncovered when a historian heard a speach he had made and knew that he making it up. He was jailed for 6 years and told to pay back all the money ha had recieved from Vet Affairs.
There wasn't much public support for him....