One of my little favorites is to simply ask them about their work uniform.
I've had guys tell me they can't remember what division they were in while doing their heroic infantry combat.
Another bust is asking the Spec ops phonies about jump school, that throws them.
As a retiree you would be very good at this, most phonies know about the big items like the armament, but they don't know about the little daily life feel, that any veteran from any branch of the service has plenty of memories of.
I befriended him and then started asking questions.
He had no photos or records, a brand new jungle green uniform that would not have been issued at the time he claims he was there, virtually no knowledge of Vietnam or the slang we spoke at the time...and he claims that his mission was so hush-hush that it is all still classified.
If it was so classified, I resaoned, why was he blabbing about it at the bar?
I confronted him with my doubts and the guy went ballistic.
Not wanting to get myself in trouble, I refrained from clobbering the guy.
I would like to expose him publically, but I'm unsure how to do it without getting into legal trouble and maybe, just maybe, he might have been there, although I'm 99.9% sure he's a fraud.
It's the little day to day stuff that me and my fellow retirees would lock-on to really quick, especially when you have "been there and done that". Good method, I'll think I'll use it.