Maguire v Makaronis

The High Court of Australia considered an appeal concerning a mortgage granted by clients, the appellants, in favour of their solicitors, the respondents. The dispute arose from the circumstances surrounding the execution of this mortgage, which secured a loan from the solicitors to the clients.

The central legal issues before the High Court were whether the solicitors had breached their fiduciary duties to their clients in relation to the mortgage transaction, and if so, what equitable remedies were available to the clients. Specifically, the Court had to determine the relevance of a causal connection between any breach of fiduciary duty and the execution of the mortgage, the scope of equity in granting rescission, and whether the clients were required to "do equity" by honouring their contractual obligation to repay the principal and interest secured by the mortgage. The Court also had to ascertain the appropriate rate of interest payable on the outstanding principal sum.

The High Court found that the solicitors had breached their fiduciary duties. The Court reasoned that while rescission of the mortgage was an available remedy, it was conditional upon the clients fulfilling their obligation to repay the principal amount owed. The Court held that the clients were required to "do equity" by repaying the principal sum. However, the Court also determined that the rate of interest payable should not be the contractual rate, but rather a rate that reflected the equitable principles governing such transactions, particularly given the breach of fiduciary duty. The Court allowed the appeal, setting aside the orders of the Court of Appeal and remitting the matter for determination of the precise terms of rescission, including the calculation of interest and the repayment period.