Miller v Bonyhady

In *Miller v Bonyhady and Anor* [1998] NSWCA 143, the New South Wales Court of Appeal considered a dispute between the appellant, Mr Miller, and the respondents, Mr and Mrs Bonyhady, concerning the enforceability of a guarantee. The core of the dispute revolved around whether the guarantee provided by Mr Miller was valid and enforceable against him, given certain circumstances surrounding its execution and the subsequent conduct of the parties.

The Court of Appeal was required to determine whether the guarantee was vitiated by duress, undue influence, or unconscionable conduct. Specifically, the court had to assess whether Mr Miller entered into the guarantee under such pressure or influence that it rendered his consent involuntary, and whether the circumstances of its creation were so unfair as to warrant setting it aside. A further issue was whether the respondents had acted in a manner that amounted to unconscionable conduct in seeking to enforce the guarantee.

The Court of Appeal found that the evidence did not support the claim of duress or undue influence. It held that Mr Miller had entered into the guarantee voluntarily, understanding its nature and consequences, and that there was no improper pressure exerted by the respondents. The court applied established legal principles regarding the vitiating factors of duress and undue influence, emphasizing the need for clear evidence of coercion or the exploitation of a dominant position. Regarding unconscionable conduct, the court found that the respondents' actions in seeking to enforce a valid guarantee did not meet the high threshold required to establish such a claim.

Ultimately, the Court of Appeal dismissed Mr Miller's appeal, finding the guarantee to be valid and enforceable. The court ordered that Mr Miller was liable under the terms of the guarantee.