OMFG these people can go fuck themselves. I've dealt with them professionally doing debt collection and fraud prevention. They're such pieces of shit.
"No, sir. You cannot pay for your mortgage / cable bill / credit card debt / whatever / in "Jackass Bucks". You must pay in U.S. dollars. We don't recognize Jackass Bucks and I'm just here to do a fucking job and don't want to hear your inane ramblings about the nature of money. Pay me... in fucking U.S. DOLLARS... or shut the fuck up."