Katherine WENTWORTH v Stephen Rares

Katherine Wentworth (the appellant) appealed to the New South Wales Court of Appeal against a decision of the Supreme Court of New South Wales. The dispute concerned the interpretation and enforceability of a deed of settlement entered into between the parties.

The primary legal issue before the Court of Appeal was whether the deed of settlement, which purported to compromise a previous legal dispute, was valid and binding on the parties, or whether it was vitiated by a fundamental mistake. Specifically, the court had to determine if the parties had proceeded on a common assumption that was false, and if so, whether that mistake rendered the contract void.

The Court of Appeal, in its reasoning, considered the principles of contract law relating to mistake. It applied the test for common mistake, which requires that the mistake be fundamental to the contract and that the parties' intentions were predicated on the truth of the assumed fact. The court found that the mistake alleged by the appellant was not of such a fundamental nature as to render the deed void. The court reasoned that the parties had intended to compromise the existing dispute, and the subsequent discovery of a fact that might have influenced their decision to settle did not negate their agreement to settle.

The appeal was dismissed.