Improper pressure or persuasion that overcomes another person's free will, often involving a relationship of trust or authority. It can make contracts, wills, or other legal documents voidable.
From 'undue' (excessive, inappropriate) from Latin 'undus' (flowing) and 'influence' from Latin 'influere' (to flow in). The legal concept developed in equity to protect vulnerable people from exploitation by those in positions of power or trust.
Undue influence is like emotional blackmail with legal consequences - it's not about force or threats, but about someone in a trusted position manipulating another person's decision-making process! The classic case is the caregiver who isolates an elderly person and gradually convinces them to change their will.
Historically applied asymmetrically: women coerced into signing away property had claims dismissed as 'weak-willed,' while men's coercion was presumed. Legal presumptions of female susceptibility to influence embedded this bias into doctrine.
Apply undue influence analysis to all parties equally regardless of gender, age, or perceived vulnerability. Avoid gendered language like 'susceptible' or 'naive.'
["coercive influence","improper pressure","compromised consent"]
Women's legal advocacy in 19th-20th centuries established that undue influence protections apply to all, dismantling gendered presumptions of weakness.
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