Tottenham have threatened to suspend the season-tickets of supporters caught trying to profit from the opening of their new stadium.
Tickets for the first game at the much-delayed 62,062-seater home against Crystal Palace on April 3 have reportedly been advertised for as much as £1,200 for a pair on social media.
A Spurs spokesman said: "Season-ticket holders or anyone else selling their tickets on social-media platforms and other unofficial websites are in breach of the club’s terms and conditions, therefore leaving themselves liable to having their accounts suspended.
"The only official way to transfer tickets is via Ticket Exchange or Ticket Share which become operational on the date tickets go on sale."
The club's Ticket Exchange allows fans to sell a ticket at face value for any individual game and the Ticket Share service enables season-ticket holders to share their tickets with a nominated friend or family member for any particular match.
Spurs on Monday announced a freeze on all season-ticket prices for next season and acknowledged "the inconvenience caused by this unique set of circumstances" after spending most of the season back at Wembley.
