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Undue Influence

15 January, 2016 - 09:32

The Restatement of Contracts (Second) characterizes undue influence as “unfair persuasion.” 1

It is a milder form of duress than physical harm or threats. The unfairness does not lie in any misrepresentation; rather, it occurs when the victim is under the domination of the persuader or is one who, in view of the relationship between them, is warranted in believing that the persuader will act in a manner detrimental to the victim’s welfare if the victim fails to assent. It is the improper use of trust or power to deprive a person of free will and substitute instead another’s objective. Usually the fact pattern involves the victim being isolated from receiving advice except from the persuader. Falling within this rule are situations where, for example, a child takes advantage of an infirm parent, a doctor takes advantage of an ill patient, or a lawyer takes advantage of an unknowledgeable client. If there has been undue influence, the contract is voidable by the party who has been unfairly persuaded. Whether the relationship is one of domination and the persuasion is unfair is a factual question. The answer hinges on a host of variables, including “the unfairness of the resulting bargain, the unavailability of independent advice, and the susceptibility of the person persuaded.” 2 See Undue Influence


A contract induced by physical duress—threat of bodily harm—is void; a contract induced by improper threats—another type of duress—is voidable. Voidable also are contracts induced by undue influence, where a weak will is overborne by a stronger one.


  1. What are the two types of duress?
  2. What are the elements necessary to support a claim of undue influence?