Castleford are seeking £500,000 in compensation after their winger Denny Solomona left the club to join rugby union side Sale.
According to the BBC, Solomona is alleged to have demanded his wages were doubled before his move, while Sale had been agitating for Solomona to move since last summer.
Court papers seen by the national public broadcaster allege Sale knew Solomona under contract until November 2018 and the club and his agent thought they would be better off if the player breached his contract rather than negotiate a transfer fee.
In the court papers are an email said to be sent by Sale’s director of rugby Steve Diamond to the Tigers chief executive Steve Gill in which an offer of £50,000 compensation was made.
An earlier offer of £150,000 rising to £200,000 had been previously withdrawn for the winger.
Castleford are suing Sale, Solomona and his agent Andy Clarke.