The Celtics issued a consumer advisory Thursday asking fans to be wary of purchasing counterfeit tickets. “The organization has received numerous reports of counterfeit playoff tickets being sold to consumers in the Boston area,” the team said in a press release.

Fans are urged to be cautious and aware of the situation. The release went on to say that the only guaranteed authentic tickets are ones that are purchased through the team website, Ticketmaster, the Garden box office or Ticketmaster’s exchange program. Fans are urged to call the Boston Police if they are suspicious of any fake tickets.