Canterbury's best forward could be on his way out of the club, with NSW Origin and Test prop David Klemmer requesting a release from his deal at the Bulldogs.

In a huge blow to Canterbury's future aspirations, it appears Klemmer could be on his way out of Belmore at the end of the season after seeking a release from the final three years of his contract.

Fairfax Media understands at the heart of Klemmer's frustrations is a perception he has been left short-changed after the club failed to commit to a number of financial arrangements previously agreed upon.

The club is trying to make sure Klemmer is compensated for the deal coming undone, but he is no guarantee to be at the Bulldogs next year.