TTN, I worked with a walt who was passing himself off as a Lt. Col., and was outed after organising a rather large Anzac Day parade. In court, he was fined some small, odd amount - presumably what he had in his pocket.
About 20 years later, he'd promoted himself to Brigadier, and the small country Returned Services League club where he was a member was bitterly divided over whether he was real or not. Of course, the army could not find his records because the WW II operations he was involved in were still top secret.