Kramer v Stone

The case of *Kramer v Stone* concerned an appeal to the High Court of Australia following decisions by the Supreme Court of New South Wales and the New South Wales Court of Appeal. The dispute arose from a share farmer's claim against the estate of a deceased landowner, Dame Leonie. The share farmer, David, alleged that Dame Leonie had made a promise to bequeath her farm to him, and that he had acted to his detriment in reliance on this promise by continuing to farm the property for many years. The trial judge found that an equitable estoppel arose, requiring Dame Leonie's estate to hold the farm on trust for David.

The central legal issues before the High Court were whether, to establish proprietary estoppel by encouragement, it was necessary for the promisee (David) to prove that the promisor (Dame Leonie) had undertaken further acts of encouragement after the initial promise, or whether the promisor needed to have actual knowledge that the promisee was relying on the promise to their detriment. The appellants, as executors of Dame Leonie's estate, argued that the trial judge erred in finding that constructive knowledge of detrimental reliance was sufficient, submitting that subjective knowledge was required.

The High Court dismissed the appeal, affirming the decisions of the lower courts. The Court held that neither further encouragement after the initial promise nor actual knowledge of detrimental reliance by the promisor were necessary elements to establish proprietary estoppel by encouragement. The Court reasoned that the unconscionability that underpins equitable estoppel arises from the promisor's conduct in making an assurance and the promisee's detrimental reliance on that assurance, where the promisor ought to have reasonably foreseen that reliance. The trial judge's finding of constructive knowledge, meaning Dame Leonie ought to have known that David's continued farming was motivated by his expectation of inheriting the farm, was sufficient to establish the necessary unconscionability.

Consequently, the appeal was dismissed with costs. The High Court upheld the equitable relief granted by the lower courts, which had declared that the farm was held on trust for David by the executors of Dame Leonie's estate, in lieu of a monetary gift provided in her will.