AG Sales Pty Ltd and Sumitomo Australia Ltd Trading as Summit Fertilizers v Mirco Bros. Pty Ltd

The parties to this proceeding were AG Sales Pty Ltd and Sumitomo Australia Ltd trading as Summit Fertilizers (the appellants) and Mirco Bros. Pty Ltd (the respondent). The dispute concerned the appellants' claim for payment for goods sold and delivered to the respondent. The matter was heard in the Supreme Court of Western Australia.

The primary legal issue before the court was whether the respondent had established a defence to the appellants' claim for payment. Specifically, the court had to determine if the respondent had proven that the goods supplied were not of merchantable quality, and if so, whether this breach of implied condition entitled the respondent to reject the goods and avoid payment.

The court's reasoning focused on the interpretation of the Sale of Goods Act 1895 (WA), particularly the implied condition as to merchantable quality. The court found that the respondent had failed to discharge the onus of proving that the goods were not of merchantable quality at the time of delivery. Evidence presented by the respondent regarding the alleged defects was found to be insufficient and speculative. The court applied the principle that a buyer seeking to reject goods on the grounds of unmerchantable quality must demonstrate that the defect existed at the time of sale and was of a substantial nature.

Consequently, the court found in favour of the appellants, holding that the respondent was liable for the price of the goods. The appeal was allowed, and the judgment of the lower court was set aside.