Gibbons v Wright
High Court of Australia · 1954
Gibbons v Wright [1954] HCA 17; (1954) 91 CLR 423
Two sisters signed mortgages they may not have been well enough to understand. Does that make the deeds nothing at all, or something the law will look at again?
Gibbons left open whether avoiding the transaction requires knowledge of the incapacity on the other side OR merely circumstances making it unfair (at 444). Later authority has not treated those as interchangeable. Beazley P states the requirement as knowledge: "[i]t is also necessary, for a transaction entered into by a person without the required capacity to be voidable, that the other party to the transaction have knowledge of the incapacity: see Gibbons v Wright at 441." The question her Honour identifies as still unresolved is a narrower one -- "whether actual knowledge of the incapacity is required or whether constructive knowledge is sufficient", citing Public Trustee (WA) v Brumar Nominees Pty Ltd [2012] WASC 161 at [90]-[96]. So do not offer unfairness as a free-standing alternative to knowledge; the live argument is about what kind of knowledge will do.
What happened?
Two sisters, Olinda and Ethel Rose Gibbons, held land in Liverpool Street and Park Street, Hobart, with their brother as joint tenants. After he died in 1943 they conveyed and transferred the land to themselves and their brother's widow as joint tenants, and then purported to sever that joint tenancy: each mortgaged her interest to a solicitor to secure a loan of £10. The widow sued, alleging the sisters had lacked the mental capacity to execute the instruments.
At a trial before Morris CJ and a jury in the Supreme Court of Tasmania, the jury found against the sisters on capacity, in answers framed around whether they could understand "the effect of the deed" — a phrase the High Court had to reconstruct from four competing versions of a summing-up that was never officially transcribed. The Full Court set aside the judgment and offered a new trial if the pleadings were amended; the plaintiff declined to amend.
What did the Court decide?
The appeal was dismissed with costs.
The Court refused a fixed threshold, holding instead that the standard is set by the transaction in question — and it read "the effect of the deed", as the jury had used the phrase, to mean "the broad operation of the deed, as distinguished from its precise terms" (at 437).
On consequence it was careful in a way the textbook summary usually is not. Proof that a conveyor could not understand the nature of the instrument "is not proof that it is not his deed, and it therefore provides no logical ground for holding that the deed is void" (at 444). What their Honours took to be settled law is narrower than the textbook line: such an instrument "is not on that account void, though in the circumstances it may be voidable by the conveyor or his representatives" ([21], at 449). Not void because of the incapacity; voidable if something further is shown. And they expressly declined to settle what that something is: "[w]e need not stay to consider whether, in order to avoid the deed, it is necessary to prove, in addition to the conveyor's incapacity, knowledge on the part of the conveyee that the incapacity exists, or whether other circumstances making the transaction less than fair to the conveyor will suffice" (at 444).
Proposition
What is the principle?
Capacity is judged against the particular transaction, not in the abstract: the law "requires, in relation to each particular matter or piece of business transacted, that each party shall have such soundness of mind as to be capable of understanding the general nature of what he is doing by his participation". A conveyance executed by a person incapable of understanding its effect in the sense of its general purport is not on that account void, though in the circumstances it may be voidable. What further circumstances are needed — knowledge of the incapacity on the other side, or unfairness — the Court expressly left open.
Why does this case matter?
Because the gap between what the case is remembered for and what it actually settles is where answers go wrong. Students carry away a one-line consequence and stop; the Court's own sentence contains a qualification and then an express refusal to go further. Read the words of the holding at 444 and 449 and notice how much of the ground they leave unoccupied — then notice that a client asking whether a transaction can be undone needs exactly that unoccupied ground.
The other thing worth taking is procedural. This case came to the High Court on jury answers whose meaning had to be reconstructed from four unofficial notes of the summing-up, taken fourteen months before anyone asked the Chief Justice to settle the differences. The doctrinal question of what a party had to be capable of understanding arose because nobody could be sure what the jury had been asked.
Exam and application relevance
Name the transaction before you say anything about the person. The question is whether its general nature could have been understood, not whether the party was generally competent, so "lacked capacity" as a global finding is the wrong shape of answer. A person may have capacity for a simple purchase and not for a complex mortgage on the same day.
Then be precise about the consequence. Incapacity does not make the instrument void, and avoidance depends on more than incapacity alone. Gibbons itself left open whether knowledge of the incapacity on the other side is required or whether unfairness would do — but do not present those as interchangeable today. In New South Wales, Beazley P has stated the requirement as knowledge, and identified the open question as whether actual knowledge is needed or constructive knowledge suffices. So address knowledge, and treat unfairness as supporting material rather than as a substitute.
Then deal with the practical consequence of voidability: someone must elect, and third-party rights acquired in the meantime may stand in the way.
Check your understanding
Your client proves she could not understand the general nature of the mortgage she signed. What else do you need before you can have it set aside?