Commonwealth v Anderson

The Commonwealth of Australia sought to recover from Mr. Anderson a sum of money it had paid to him by mistake. The dispute concerned whether Mr. Anderson was legally entitled to retain this money, which had been paid in excess of his entitlement under a contract for the supply of goods. The matter came before the High Court of Australia.

The central legal issue before the High Court was whether the Commonwealth could recover money paid by mistake, and if so, under what circumstances. Specifically, the Court had to consider the principles governing the recovery of money paid under a mistake of fact, and whether the recipient of such money had a defence to its repayment.

The Court affirmed the established principle that money paid under a mistake of fact is recoverable by the payer. However, it was also recognised that such recovery is subject to equitable defences, including where the money has been paid to a person who was, at the time of payment, entitled to receive it, or where the recipient has, in good faith and for value, altered their position in reliance on the payment. The Court examined the specific facts to determine if any such defence applied in Mr. Anderson's favour.

The High Court found in favour of Mr. Anderson, holding that he was entitled to retain the money paid to him by mistake. The Court concluded that Mr. Anderson had, in good faith, altered his position in reliance on the payment, and that it would be inequitable to require him to repay the sum.