Coercion and undue influence are both doctrines concerned with whether consent to an agreement was genuinely free, but the pressure operates differently. Coercion generally involves threats, force or unlawful pressure. Undue influence involves one party improperly using a position of trust, authority or dominance over another.
Exact statutory definitions and remedies differ by jurisdiction.
At a glance
| Point | Coercion | Undue Influence |
|---|---|---|
| Type of pressure | Threat/force/unlawful pressure | Relational, psychological or fiduciary dominance |
| Relationship required | Not necessarily | Often a relationship of trust, dependency or ascendancy is central |
| Example | Sign this contract or I will unlawfully harm you/property | A caregiver pressures a dependent elderly person to transfer assets for the caregiver’s benefit |
| Evidence focus | Threats, conduct and causal link to agreement | Relationship, vulnerability, transaction fairness and influence |
| Legal result | May render agreement void/voidable depending on law | Often voidable if proved/presumed and not rebutted |
Coercion
Pressure involving threats, force or unlawful acts used to obtain consent.
Undue Influence
Improper persuasion arising from a relationship in which one party can dominate or significantly influence the other’s decision-making.
Undue influence is more than ordinary persuasion
Salesmanship, emotional appeal and advice are not automatically undue influence. The law looks for influence that crosses the line into improper domination or prevents an independent decision, particularly where the transaction strongly benefits the influential party.
Independent advice can matter
In transactions involving vulnerable parties or fiduciary relationships, independent legal advice can help demonstrate that the person understood the decision and acted freely. It does not cure every problem, but it can be important evidence.
Jurisdiction changes the test
Some legal systems define coercion, duress and undue influence separately, while others use different terminology. Contract-law exams should follow the statute and cases assigned by the course.
Important note
This page explains general legal concepts. Apply the law of the relevant jurisdiction to any real contract.
Frequently asked questions
Is economic pressure coercion?
Severe illegitimate economic pressure may fall under doctrines such as economic duress, depending on jurisdiction.
Does undue influence require a threat?
No. The concern is improper influence arising from the relationship.
Can family relationships create undue influence?
They can, but family relationship alone does not automatically prove it.
What is the usual remedy?
Often rescission/setting aside the transaction, subject to local law and equitable rules.
Sources and further reading
KnowDifferences Editorial Team
Independent explanations with definitions, practical examples and references. Read our editorial approach.