With an NFC Divisional playoff game set for Jan. 15, the Green Bay Packers and Green Bay Police Department on Wednesday reminded fans to be wary when purchasing tickets from secondary and unofficial ticket sources.

Tickets purchased from secondary sources can be fraudulent or counterfeit. This season has seen an increase in the number of such instances.

“Counterfeit tickets often look real enough that fans don’t discover the ticket has been duplicated or is counterfeit until trying to enter the stadium,” said Green Bay Police Lt. Kevin Warych. “The best advice we can give is to do your research and know your source.”

The Packers recommend fans utilize team partners Ticketmaster and Packer Fan Tours for purchasing tickets or ticket packages.

Other ticket sources, according to the Wisconsin Bureau of Consumer Protection, should be members of the National Association of Ticket Brokers, as these businesses carefully screen ticket offers and take other measures to protect consumers from ticket fraud.

On gameday near the stadium, the best location to purchase tickets is on Armed Forces Drive near Oneida Street. Ticket sellers located there must be licensed to have a seller’s permit and display that permit.