California Codes, Civil Code - CIV, Division 3 — Obligations, Part 2 — Contracts, Title 1 — Nature of a Contract, Chapter 3 — Consent, Section 1569
Duress consists in any of the following:
(a) Unlawful confinement of the person of the party, or of the spouse of such party, or of an ancestor, descendant, or adopted child of such party or spouse.
(b) Unlawful detention of the property of any such person.
(c) Confinement of such person, lawful in form, but fraudulently obtained, or fraudulently made unjustly harassing or oppressive.
Notes
Defines duress as unlawful confinement of a contracting party or specified family members, unlawful detention of their property, or confinement that is lawful in form but fraudulently obtained or fraudulently made unjustly harassing or oppressive. The covered family relationships include a spouse, ancestor, descendant, or adopted child.
Use as reference
Lexinter.net | California Code, Civil Code - CIV § 1569 | https://laws.lexinter.net/codes/california/civil-code/division-3/part-2/title-1/chapter-3/section-1569