As the secondary market for Bears tickets gets busier -- so apparently do the counterfeiters.
The Bears Friday issued a warning to fans to be on alert for fake tickets.
"We have seen an increase in counterfeit tickets presented by fans entering Bears home games recently and the vast majority has been said to be purchased on Craigslist," Brandon Faber of the Bears told the Tribune.
"We are trying to help remind fans to be sure to purchase through verified sites to ensure they are buying legit tickets and avoid any issue when entering the stadium on game day."
The first-place Bears host the Lions on Sunday at Soldier Field. Craigslist has several listings for tickets to Sunday's games as well as the remaining home games.
Craigslist has not not respond to a request for comment.
For the Bears, the official ticketing partners are Ticketmaster and the NFL Ticket Exchange. Tickets, meanwhile, are also plentiful on StubHub and SeatGeek for anywhere from $90 to $700. Those are considered reputable sellers that offer guarantees.
Experts say that buying items such as used furniture on Craigslist can be safe. But not so much with tickets.
"This commodity is not like buying a purse or a hat. This is something that expires like ice cream," Joseph Asaro, StubHub's chief security officer told the Washington Post recently. "The minute you go to that gate and you can't get in, you've got a problem -- and there's no organization to back it up."