Who’s your father for inheritance purposes in California? Family Code section 7540(a) states that “the child of spouses who cohabited at the time of conception and birth is conclusively presumed to be a child of the marriage.” A child covered by this marital presumption is not an heir of a deceased third person even if genetic testing proves a parent-child relationship.
In Estate of Franco (2023) 87 Cal.App.5th 1270, the Court of Appeal clarified that, in order for the marital presumption to be applied, there must be a clear showing of cohabitation (living together) at the time of conception and birth.



On November 20, 2019, California
(Editor’s Note: The Court of Appeal granted rehearing on December 2, 2019 and later depublished the portion of its opinion discussed below such that it is no longer citable authority in California courts.)