Real Salt Lake sent out a tweet Tuesday notifying fans who somehow obtained the code, which was meant for season-ticket holders from Sporting Kansas City, Real's opponent and host for the Dec. 7 title match.
"The leaked code was declared invalid by SKC/TM (TicketMaster) and your tix will be cancelled," the tweet said. "E-mails from TicketMaster will go out tomorrow (Wednesday) explaining use of the invalid code and the timeline for refunds."
It was not clear how the opportunistic Salt Lake fans got hold of the code, which was supposed to give Kansas City's season ticket holders first crack at the seats, the Kansas City (Mo.) Star said. The problem was discovered when Real Salt Lake fans began spreading the word on social media about the purchase code.
The newspaper said the glitch basically sent ticket sales back to square one. Real Salt Lake fans will have to make do with the 1,000 tickets allocated to the visiting side and Kansas City fans will also have their online purchases invalidated.