Hannigan v Inghams Enterprises Pty Ltd

Hannigan v Inghams Enterprises Pty Ltd was a case before the Supreme Court of Queensland, where the plaintiff, Hannigan, sought a declaration that a contract with the defendant, Inghams Enterprises Pty Ltd, was not terminated, and later sought damages under the same contract. The court was required to determine whether it was unreasonable for Hannigan not to have pursued a damages claim in the earlier proceedings and if the second proceedings should be stayed based on estoppel by judgment and Anshun estoppel principles. Hannigan had initially brought proceedings seeking a declaration that a contract was not terminated. The matter was heard by Robb J, who made such a declaration. Subsequently, Hannigan initiated a second proceeding seeking damages under the same contract. Inghams Enterprises argued that Hannigan's failure to bring the damages claim in the earlier proceedings was unreasonable and sought to stay the second proceedings based on estoppel by judgment and Anshun estoppel.

The court considered the principles of estoppel by judgment and Anshun estoppel, examining whether Hannigan's conduct was unreasonable in not bringing the damages claim in the earlier proceedings. The court found that it was not unreasonable for Hannigan not to have raised the damages claim earlier, as the focus of the first proceeding was solely on the termination of the contract. The court held that the second proceeding should not be stayed, as the issues in the two proceedings were distinct and the estoppel principles did not apply to prevent Hannigan from pursuing the damages claim. The court's decision emphasised the importance of distinguishing between different causes of action and the circumstances under which Anshun estoppel may apply.