D.M.H. Imports (Aust) Pty Ltd v the Boeing Company

In the Supreme Court of New South Wales, Justice Ian Forno considered a dispute between D.M.H. Imports (Aust) Pty Ltd and The Boeing Company. The core of the disagreement concerned the enforceability of a settlement agreement reached between the parties, which D.M.H. Imports sought to have set aside.

The primary legal issue before the court was whether the settlement agreement was vitiated by a fundamental mistake, thereby rendering it voidable. Specifically, the court had to determine if both parties shared a common, mistaken belief about a crucial fact that underpinned the agreement, and if that mistake was so fundamental that it would be unjust to hold the parties to their bargain.

Justice Forno's reasoning focused on the principles of contract law relating to mistake. His Honour examined the evidence to ascertain the precise nature of the parties' understanding at the time the settlement was executed. The court applied the test for common mistake, considering whether the mistaken assumption was a condition precedent to the contract's formation or a shared assumption that, if false, would render the contract fundamentally different from what the parties believed it to be. The court found that the mistake alleged by D.M.H. Imports was not of the requisite fundamental nature to vitiate the settlement agreement.

Consequently, the court dismissed D.M.H. Imports' application to set aside the settlement agreement.