Carlisle have revealed that they would be unable to turn down a bid of £1.14million for Joe Garner.
Under the terms of the contract he signed on joining the Cumbrians from Blackburn last August any club biding £1million on top of the £140,000 Carlisle paid for his services will be free to talk to the striker.
Carlisle reluctantly accepted these conditions in order to stop the youngster agreeing to join SPL outfit Dundee United, but may now be left to rue that decision.
Not only would they be losing a player who scored 14 goals in 34 appearances for them last season, they would also miss out financially.
With Blackburn set to pocket 50% of any potential transfer fee, plus the player and his representatives receiving a 5% cut of the deal, Carlisle would be left with just £590,000 of the £1.14million.
With Nottingham Forest monitoring the situation closely, having had a previous offer for the forward knocked back, the Blues' chief executive David Allen admits that the club are powerless to prevent Colin Calderwood's side from triggering the release clause.
"We have always wanted to keep Joe," he told the club's official website.
"He is extremely popular with the fans and everyone at the club. Of course, he is also a great young player with tremendous potential who is working hard to recover from a very serious injury, which is likely to sideline him for several more months.
"But there is nothing we can do to stop Nottingham Forest, or any other club for that matter, speaking to Joe once they have reached the £1.14million trigger.
"Our relationship with Forest and with Joe remains good but I would like to stress that it was not Carlisle United who informed Forest of the £1.14million trigger.
"As I say, we have always wanted to keep Joe as a Carlisle United player and we are mindful that he still has two years to run on his contract with us."
Meanwhile, Carlisle have taken 18-year-old defender Tyrone Cameron on a week-long trial.
The former Fulham trainee has spent the last few weeks at the Glenn Hoddle Soccer School, but is expected to feature for John Ward's side in a friendly against Chester on Tuesday.
"He's been away with Glenn, so we've had to wait to bring him here, but we're pleased to be able to give him a trial," said Ward.
"He's a player that we have known about for a while, and our scouts watched him a couple of times last season as we tracked his progress."