In equity, oral evidence is admissible to make out a case for rectification or rescission of an instrument1, or to show that what purports to be an agreement is not in fact an agreement at all, for example, where it has been signed by mistake2. In such cases the evidence is admissible, not to contradict what appears on the face of the agreement (which the court will not allow), but to prove the existence of a mistake which could not otherwise be proved
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Definition of automatismAn act is done in a state of automatism if it is done by the body without control by the mind, (eg it is a spasm or a reflex), or if it is done by a person who is not conscious of what they are doing. The act may be described as involuntary, but will not be regarded as such
When is quantum meruit and quantum valebat relevant?Claims in quantum meruit (value of services) and quantum valebat (value of goods) arise in diverse situations ranging from where contractual terms are silent on issues of payment to where there is no contract at all (Serck v Drake & Scull).General
What is a res judicata?A res judicata is a decision given by a judge or tribunal with jurisdiction over the cause of action and the parties, which disposes, with finality, of a matter decided so that it cannot be re-litigated by those bound by the judgment, except on appeal.Final judgments by
For guidance on the basic features of the doctrine of estoppel and the different classifications it has been subject to, see Practice Note: Estoppel—what, when and how to plead and related content.Promissory estoppel—what is it?Where A has, by words or conduct, made to B a clear and unequivocal
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