Alliance Craton Explorer Pty Ltd v Quasar Resources Pty Ltd and Anor

Alliance Craton Explorer Pty Ltd (Alliance) and Quasar Resources Pty Ltd (Quasar) were parties to a dispute concerning the interpretation and effect of a deed of assignment and a subsequent deed of release. The matter came before the High Court of Australia.

The central legal issues before the High Court were: (1) whether the deed of assignment effectively transferred to Alliance the benefit of a claim that Quasar had against a third party, and (2) whether the deed of release, which purported to release Quasar from all claims by Alliance, operated to extinguish Alliance's right to pursue that assigned claim.

The High Court considered the principles of contractual interpretation, particularly in relation to the language used in the deeds. It analysed the scope of the assignment, determining whether the intention of the parties, as evidenced by the deed of assignment, was to transfer the specific claim in question. The Court then examined the effect of the deed of release, considering whether it was intended to encompass claims that had already been assigned. The Court applied established principles regarding the construction of deeds and the effect of releases, focusing on the clear and unambiguous language of the documents to ascertain the parties' intentions.

The High Court found that the deed of assignment did not effectively transfer the benefit of the claim to Alliance. Consequently, the deed of release, which released Quasar from claims by Alliance, did not operate to extinguish a claim that Alliance did not possess. The appeal was dismissed.