Tottenham Hotspur have banned three season tickets holders.
The three supporters attempted to re-sell their Champions League final tickets.
A statement from the club read: "The club has this week issued indefinite bans to three Season Ticket Holders who have listed their UEFA Champions League Final tickets for sale on a secondary ticketing platform.
"Once again, we wish to remind all our supporters that any ticket purchased is for the sole use of the individual that purchases it from the Club. Transferring or selling tickets on unofficially breaches our terms and conditions and is against the law.
"We shall look to take the strongest possible action against anyone found to be engaging in such activity - including indefinite Season Ticket bans.
"Additionally - if we are made aware of tickets being sold on by supporters after collection we will cancel the original match tickets with UEFA and the Wanda Metropolitano Stadium in Madrid, meaning these tickets will no longer be valid for entry to the stadium."