Harding v Coburn [1976] 2 NZLR 577 was a New Zealand case that was one of the first that upheld that the Illegal Contracts Act 1970 had the power to validate (i.e. make legal) despite the fact that another legal enactment "deemed to be unlawful and shall have no effect".

Under this Act, failure to obtain such a consent made the sale "unlawful and shall have no effect".

As a consequence, Coburn sought the relief of validation under section 7 of the Illegal Contracts Act 1970.

The Court of Appeal ruled that the courts had the power to validate contracts that are deemed illegal unless the other Act expressly prohibits validation under the Illegal Contracts Act.

Footnote: This position was later upheld by the Privy Council in Ross v Henderson [1977] 2 NZLR 458.