Civil Code section 3399

When, through fraud or a mutual mistake of the parties, or a mistake of one party, which the other at the time knew or suspected, a written contract does not truly express the intention of the parties, it may be revised on the application of a party aggrieved, so as to express that intention, so far as it can be done without prejudice to rights acquired by third persons, in good faith and for value.

Source: Section 3399, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=CIV§ionNum=3399.­ (accessed Oct. 12, 2026).

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Verified:
Oct. 12, 2026

§ 3399's source at ca​.gov