I did some work for a old guy, well older than me, he paid me cash, which was in old $100 bills, 1982 bills, used these to buy stuff and you would beleive how many freaking idots are out there. Heck even one guy even called the cops on said the bills was counterfeit, i guess old bills that are that old are supposed to be takin out of circulation. Everyone tried to use the pen to see it they were real, hold them up to the light to see the strip, funny watching these idiots