We've had a couple of counterfeit casino chip problems here in Kansas City.

In 2008, at Argosy Casino in Riverside Missouri had someone cashing in $100 chips (he was later acquitted which I just learned today in my research!)

http://www.kshb.com/dpp/news/crime/man-accused-of-using-counterfeit-chips-at-the-argosy-casino
http://onlinecasinosuite.com/casino-blog/kansas-man-acquitted-of-defrauding-casino/3935/

A couple years ago I had bought into a game with a couple $100 chips at a different casino in Kansas City. The pit boss scrutinized the chips very closely before accepting them. I asked what was up and they told me someone was "painting" chips and trying to pass them off as $100 chips. I never heard anything on the news about this particular situation however.