There is an entire subculture of leftists in this country who make their living by falsely claiming to war veterans.
That is an observation that I really hadn't considered...but how do you prove it?
The famous book Stolen Valor proves beyond a shadow of a doubt that the fake veteran subculture exists.
And you really can write anything you want on an FEC form. Every election cycle sees donations made by foreign nationals claiming to be US citizens, such august individuals as Seymour Butts and Ben Dover making donations, etc.
Plenty of people make donations listing a different employer because they don't want their employer to know who they are contributing to: i.e. Jim Jones who works at Acme has a supervisor who is a gung-ho leftist and is afraid that if he donates as Jim Jones of Acme his boss will find out - so he donates as Jim Jones of Worldwide International instead.
The good news is, (sarcasm) in order to smear Dr. Paul you don't have to prove it, you just have to post that claim on thread after thread and have your cronies chime in with words and phrases like "surrender monkey", "traitor", "isolationist", "kook" etc.