Abriel & Ors v AGC & Anor

The High Court of Australia considered an appeal concerning the interpretation of a guarantee agreement. The appellants, Abriel and others, sought to enforce a guarantee provided by AGC and another party in relation to a loan facility extended to a company. The core of the dispute revolved around whether the guarantee was validly executed and enforceable against AGC.

The primary legal issue before the High Court was whether AGC was bound by the guarantee, notwithstanding that it was not signed by an authorised representative of AGC. The court had to determine the principles governing the enforceability of guarantees, particularly in circumstances where the guarantor's liability is sought to be established through conduct or implied authority, rather than express written agreement.

The High Court analysed the evidence regarding the purported execution of the guarantee and the authority of the individual who signed on behalf of AGC. The court affirmed the general principle that a guarantee must be in writing and signed by the guarantor or their authorised agent to be enforceable. It found that the evidence did not establish that the individual who signed had the actual or ostensible authority to bind AGC to the guarantee. Consequently, the guarantee was not enforceable against AGC.

The High Court allowed the appeal, setting aside the orders of the lower court and ordering that the appellants' claim against AGC be dismissed.