Peter Warren (Fairfield) Pty Ltd v McMartin

In *Peter Warren (Fairfield) Pty Ltd v McMartin*, the New South Wales Court of Appeal considered a dispute between a car dealership, Peter Warren (Fairfield) Pty Ltd, and a former employee, Mr. McMartin. The core of the disagreement concerned the dealership's entitlement to recover certain payments made to Mr. McMartin, which the dealership alleged were made under a mistake of fact.

The primary legal issue before the Court of Appeal was whether the dealership could recover the payments made to Mr. McMartin on the basis that they were made under a mistake of fact, and if so, whether any defences were available to Mr. McMartin. Specifically, the court had to determine if the payments were indeed made under a relevant mistake and whether Mr. McMartin had changed his position in reliance on those payments to such an extent that it would be inequitable for the dealership to recover them.

The Court of Appeal, applying established principles of the law of restitution, found that the payments were made under a mistake of fact. However, the court also considered the defence of change of position. It held that for this defence to succeed, Mr. McMartin needed to demonstrate that he had altered his position in good faith in reliance on the mistaken payments, and that it would be inequitable to require him to make restitution. The court examined the evidence presented regarding Mr. McMartin's expenditure and financial circumstances to assess the validity of this defence.

Ultimately, the Court of Appeal allowed the appeal in part, finding that while the payments were made under a mistake, Mr. McMartin had successfully established a defence of change of position to a certain extent. The court varied the orders of the lower court to reflect this partial success, ordering Mr. McMartin to repay a portion of the mistaken payments.