Clark v Macourt

The appeal before the High Court of Australia concerned a dispute between Dr Anne Clark and Dr David Macourt (representing a company) regarding the sale of a fertility clinic business. Dr Clark purchased assets, including frozen sperm, from Dr Macourt's company. The company warranted that the donor consents, screening, and identification for the sperm complied with applicable guidelines. However, a significant portion of the delivered sperm was found to be unusable due to breaches of this warranty. Dr Clark subsequently purchased replacement sperm from an alternative supplier and charged her patients a fee to cover most of the acquisition costs.

The central legal issues before the High Court were the appropriate measure of damages for the breach of warranty and whether Dr Clark had adequately mitigated her loss. Specifically, the court had to determine whether damages should be assessed by reference to the amount Dr Clark was unable to recoup by using the non-compliant sperm in her business, or by reference to the cost of acquiring compliant replacement sperm at the date of the breach. The court also considered whether Dr Clark's practice of charging patients a fee for the replacement sperm constituted mitigation of her loss.

The High Court applied the fundamental principle that damages for breach of contract are intended to place the innocent party, as far as money can do so, in the same situation as if the contract had been performed. This principle, traceable to *Robinson v Harman*, means that a plaintiff is not entitled to be placed in a superior position than they would have been had the contract been fulfilled. The court reasoned that Dr Clark's subsequent transactions with her patients, including charging them for the replacement sperm, were irrelevant to determining the value of the sperm that should have been delivered under the contract. The loss was the value of the warranted sperm that was not supplied, and the cost of acquiring replacement sperm to achieve the contractual benefit was the appropriate measure.

The High Court allowed the appeal, setting aside the orders of the Court of Appeal. The court ordered that Dr Macourt pay Dr Clark's costs of the proceedings in the Supreme Court on an indemnity basis for a specified period and otherwise on the ordinary basis. The court agreed with the assessment of damages undertaken by the primary judge, which involved assessing the value of what should have been delivered in accordance with the vendor's contractual promise.