Westpac Banking Corporation v Ollis

The case involved Westpac Banking Corporation suing the customer, Ollis, over the recovery of funds amounting to approximately $11 million. The dispute arose from the bank's failure to cancel or suspend the auto-transfer replenishment facility of the customer, resulting in the customer writing cheques exceeding the facility's limit over a period of seven months. The customer was aware of the bank's error and knowingly took advantage of it. The case was heard in the Federal Court of Australia.

The primary legal issue in the case was whether the bank could recover the mistaken payments made to the customer. The court had to determine if the bank's error was fundamental or basic to the transaction and if the customer had dishonestly taken advantage of the mistake. Additionally, the court needed to consider the principles concerning fraud claims and whether the moneys were held on trust for the bank by the customer. The court also had to consider the liability of third-party recipients and the available remedies in such cases.

The court held that the bank could recover the mistaken payments from the customer. The error made by the bank was fundamental to the transaction, and the customer had knowingly and dishonestly taken advantage of it. The court found that the moneys paid by mistake were impressed with a trust in favour of the bank, and the customer was liable for the fraudulent procurement of those funds. The principles of Barnes v Addy applied, and the court held that the customer was a constructive trustee of the funds. The court also found that the customer had acted dishonestly and was liable for the full amount of the mistaken payments.

The final orders of the court were that the customer was to repay the bank the full amount of the mistaken payments, plus interest. The court also found that the customer was a constructive trustee of the funds and that any third-party recipients of the funds were liable to account for them to the bank. The court further held that the customer was liable for any losses suffered by the bank as a result of the fraudulent procurement of the funds.