Copping v Commercial Flour and Oatmilling Co Ltd

The appellant, Copping, entered into a contract with the respondent, Commercial Flour and Oatmeal Milling Co Ltd, for the sale of wheat. A dispute arose concerning the payment for this wheat, specifically whether the respondent was entitled to recover the difference between an initial advance payment made to the appellant and the final price fixed by the contract. The matter was heard by the High Court of Australia, which affirmed the decision of the Supreme Court of South Australia.

The central legal issue before the High Court was whether the buyer, the respondent, had a right to recover from the seller, the appellant, the amount by which the initial advance payment exceeded the final contract price for the wheat. This question turned on the interpretation of the contract and the legal implications of the advance payment in the context of the agreed-upon pricing mechanism.

The High Court reasoned that the contract established a fixed price for the wheat as at 31 December 1930. The initial payment made to the appellant was an advance against this final price. Consequently, when the final price was determined to be lower than the advance paid, the respondent was legally entitled to recover the surplus amount paid. The Court applied principles of contract law concerning payment and the recovery of overpayments where a contract specifies a final price. The respondent was therefore entitled to recover the difference between the 3s. 4d. per bushel paid to the appellant and the 1s. 8d. per bushel which was the rate fixed by the contract as on 31st December 1930.