The agreement can act as a contract to make a will requiring one spouse to provide for the other at death. It can also limit probate rights at death, such as the right to a probate allowance, the right to act an executor, the right to take as a predetermined heir, and so forth.
In California, Registered Domestic Partners may also enter into a prenup. Prenups for Domestic Partners can have added complexities because the Domestic Partner does not have the benefit of federal tax law that favors married couples.
In California, courts have not allowed penalties in prenups that sanction people for infidelity or using recreational drugs. Court will not enforce requirements that one person will do the dishes or that the children will be raised in a certain religion.Postmarital agreements are treated very differently in California law. Spouses have a fiduciary duty to one another so premarital agreements come under a special category of agreements. There is a presumption that the postmarital agreement was obtained by undue influence if one party gains an advantage. Disclosure cannot be waived in the context of a postmarital agreement.