Judicature Act 1908, section 94B. "Relief ... in respect of any payment made under mistake, whether of law or of fact, shall be denied wholly or in part if the person from whom relief is sought received the payment in good faith and has so altered his position in reliance on the validity of the payment that in the opinion of the court, having regard to all possible implications in respect of other persons, it is inequitable to grant relief, or to grant relief in full, as the case may be."
