There is no way for you to know for sure?
It would be an utterly simple task for someone to obtain a military lift ticket (the ones that they sell on base) and copy it onto some card stock or maybe do a semi-professional job of duplicating it.
I've seen some pretty darn good counterfeit college football game tickets, so it wouldn't be a huge stretch for someone to counterfeit a lift pass which has a higher face value.
Read on another forum: "If someone held a gun to my head and said, "You have to move to Salida tomorrow", I'd probably do it. If they told me I had to go to Breckenridge instead, I think I'd just let them pull the trigger."