Fans hoping to scalp a ticket to Saturday’s 49ers playoff game should be wary of counterfeit tickets.

Authorities have already confiscated counterfeit tickets for the home game against the Saints and authorities are warning fans to be cautious, according to a press release from the San Francisco 49ers.

Saturday’s game is sold out, which means the team will not be able to replace counterfeit tickets, according to the statement.

Reputable vendors, such as Ticketmaster, are the best bets for tickets. But fans planning to purchase from unofficial or second-hand sources should review tickets or research their source before purchasing, according to the statement.