Sande v Medsara Pty Limited

The matter of Sande v Medsara Pty Limited involved the plaintiff, Mr Sande, seeking rectification of contracts that arose from the exercise of put and call options due to a unilateral mistake. The defendants, Medsara Pty Limited, had argued that the contracts should not be rectified as the mistake was not mutual and they had not acted unconscionably. The case was heard in the Federal Court of Australia.

The central legal issues were whether the unilateral mistake was significant enough to warrant rectification and whether the defendants' conduct could be considered unconscionable. The court had to consider the nature and purpose of put and call options, and the extent to which one party's knowledge of the mistake could be held against the other. Additionally, the court needed to determine if the defendants' actions in concluding the contract without addressing the mistake amounted to unconscionable conduct.

The court found that the unilateral mistake was indeed significant and the defendants had knowledge of the mistake but did not take steps to correct it. The court emphasised the importance of the meaning and purpose of the put and call options in reaching this conclusion. Furthermore, the court held that the defendants' conduct was unconscionable as they exploited the plaintiff's mistake for their benefit. Consequently, the contracts were rectified to reflect the true intentions of the parties.

The court ordered that the contracts be rectified to reflect the true intentions of the parties, effectively nullifying the transactions that occurred due to the unilateral mistake. This decision underscored the importance of clarity in contractual terms and the duty to act in good faith, particularly in complex financial arrangements.