Darling v Credit Lyonnais Australia Limited; Stacey v Credit Lyonnais Australia Limited

These proceedings before the High Court of Australia concerned applications for leave to appeal in two matters, *Darling v Credit Lyonnais Australia Limited* and *Stacey v Credit Lyonnais Australia Limited*. The central dispute revolved around the enforceability of guarantees provided by the applicants, and whether subsequent variations to the underlying agreements prejudiced the guarantors' rights.

The legal issues before the court included whether a contractual term could be drafted to extinguish prospective rights of guarantors irrespective of future events, and whether a subsequent variation of an agreement between a credit provider and a debtor could disentitle a guarantor from relying on certain contractual provisions within the guarantee itself. The court was also required to consider whether such variations were within the contemplation of the original guarantee documentation.

The applicants argued that the trial judge and the minority in the Court of Appeal correctly identified significant prejudice and a subsequent variation of the agreement that excluded a contractual provision potentially disentitling the guarantors. In contrast, the majority in the Court of Appeal found that while a variation occurred, it was within the contemplation of the original documentation, thus not imposing a restraint on the credit provider's rights. The applicants contended that despite factual differences, the various guarantee clauses presented had a similar tenor and operational ambit, offering guidance for similar factual situations.