Sion v NSW Trustee & Guardian

The appeal concerned a dispute between the appellants and the NSW Trustee & Guardian, acting as executor of the estates of a deceased married couple. The appellants alleged that the deceased couple had made a promise to leave their estates to them in exchange for the appellants providing care for the couple and managing their affairs. The appellants sought to enforce this alleged promise. The matter was heard in the Court of Appeal of New South Wales.

The primary legal issues before the Court of Appeal were whether a binding contract had been formed between the appellants and the deceased couple, and alternatively, whether the doctrine of estoppel could be invoked to prevent the NSW Trustee & Guardian from denying the appellants' claim. Specifically, the court had to consider whether the deceased wife had the intention to be legally bound by the alleged promise, given that the alleged promisees were family members, and whether the terms of the alleged agreement were sufficiently certain to be enforceable.

The Court of Appeal dismissed the appeal, finding that the appellants had failed to establish the necessary elements for either a contract or estoppel. The court reasoned that the evidence did not demonstrate a clear intention on the part of the deceased wife to create legal relations with the appellants. Furthermore, the terms of the alleged agreement were found to be too uncertain to constitute a binding contract. The court also concluded that the elements of reliance and detriment required for an estoppel claim were not sufficiently made out.

Consequently, the Court of Appeal ordered that the appeal be dismissed and that the appellants pay the respondent's costs in the Court of Appeal.