Galatasaray have revealed reported Manchester United target Wesley Sneijder has a release clause of €20m that can be activated this summer.
The Netherlands international has been relentlessly linked with a move to the Premier League giants during different stages of his career.
Sneijder was close to joining United in the summer of 2011 and David Moyes attempted to sign the player in the final days of the summer transfer window last year.
The 31-year-old recently admitted he would find it very difficult to turn down the opportunity to link up with national team manager Louis van Gaal at Old Trafford following Netherlands' World Cup campaign.
And Galatasaray have since admitted they would be powerless to stop the midfielder from leaving the club should the right offer come in.
"Sneijder is a good player," club president Unal Aysal was quoted as saying by ESPN. "We want to keep him at Galatasaray.
"If Galatasaray receive an offer of €20m, we do not have the luxury of saying no. That is stipulated in the contract. All I can say is that if any club pays us €20m and he wants to go, we can't force him to stay because it is written in the contract."
Sneijder, who joined Galatasaray in January 2013, recently stated he is happy to remain at the Turkish champions, but suggested it would be difficult to turn down an offer from van Gaal to join him at United.
"He trains his players very hard and always expects the highest standards," Sneijder was quoted as saying by the Manchester Evening News on the Netherlands boss last month.
"I am happy at Galatasaray. I have established myself at the club and have settled in. However, if van Gaal were to make me an offer I would have to at least consider it.
"Nobody from the Netherlands can simply reject van Gaal. In the Netherlands van Gaal is something like the head teacher of a school. Not everyone is lucky enough to get into his good books."