An NFL ticketing issue could lead to tickets for the Super Bowl sold out within hours of their official sale date.
The NFL said Sunday it was investigating a possible ticket scalping incident on the opening night of the game in Houston.
The NFL did not specify which seats the tickets were sold to or whether the tickets had been bought online or at the box office.
“It is not acceptable for fans to attempt to purchase tickets from individuals using fraudulent information or using false credentials to obtain tickets,” the NFL said in a statement.
The league added that it was working with ticket resellers to ensure fans do not have to pay additional fees to obtain a ticket.
The problem comes amid a spike in scalping of NFL tickets this year, which has drawn criticism from fans and ticket brokers.
In recent months, the NFL has faced complaints from fans who say tickets have sold out in minutes or seconds and have complained about scalping.