By Steve Shaw, News 9

OKLAHOMA CITY -- Thunder playoff success has had a downside for a few playoff ticket buyers. 

Nearly all of the tickets to Thunder playoff games are printed off on a season ticketholder's home computer.  Police and the team confirm that in a few cases, unscrupulous ticket dealers have made copies of tickets they purchased legitimately. In some cases, they made multiple copies. 

The problem is only one of those printed tickets works. Mike Chandler is a local ticket broker who says scalpers who come in from out of town are to blame. He says because they're from out of town, it's easier for them to scam fans out of their money. 

Chandler says one way to prevent that is to make a scalper show an Oklahoma Drivers License or Oklahoma I.D.

Thunder Vice President of Ticket Sales Scott Loft says the only way to make sure you purchase legitimate second-hand seats is by going to the team's website and clicking on the "ticket exchange".