Undue influence in English law
Undue influence in English law is a field of contract law and property law whereby a transaction may be set aside if it was procured by the influence exerted by one person on another, such that the transaction cannot "fairly be treated the expression of [that person's] free will". Historically the doctrine had predominantly been invoked where the person who is exercising undue influence over another person either enters into a contract with the affected person or receives a gift from them. However, much of the recent case law relates to three party cases, where one person (often a husband) exerts undue influence on a second person (the wife) to enter into a transaction (providing a guarantee or security for the husband's debts) with a third party (often a bank). The doctrine originally developed because of perceived limitations in the law relating to duress. Although the modern law is different, previously in order to set aside a contract for duress it was necessary to show a threat of violence to the person (this is now no longer the case), and the doctrine developed in response to more subtle forms of coercion. Accordingly, many earlier cases which refer to undue influence