Not every disinheritance is intentional. For example, a parent may execute a trust when they have two children, and then a third child is born five years later with no update to the trust.
Alternatively, a man may remarry at 72 but never amend his estate plan to account for his new spouse.
When these people die, the question may not be whether their plan was valid. The question may be whether someone who was left out has a legal right to a share anyway.
California law says yes to this question, in specific circumstances. The Probate Code contains protections for children and spouses who were accidentally omitted from a will or trust, and those protections can redirect substantial portions of an estate. For the omitted heir, the statutes may provide a path to recover what the law presumes they were meant to receive.
The other beneficiaries who were named in the estate plan may feel blindsided by these new claims. Or some of them may seek to include the new heirs and to ensure the decedent’s wishes are faithfully carried out. Either way, the stakes are high, the law is technical, and how the case is litigated matters enormously.
What A Pretermitted Child Actually Is
Probate Code sections 21620 through 21623 deal with children who were born or adopted after a parent executed a will or trust and who receive nothing under the document. California calls these “pretermitted” children. The statutes’ logic is simple: if a parent created an estate plan before a child existed and never got around to updating it, the law assumes the omission was accidental, not deliberate.
That assumption carries real consequences. A pretermitted child may be entitled to a share of the estate as if the parent had died without a plan at all (what lawyers call “intestate succession”). Depending on the size of the estate and the number of other beneficiaries, that share can be worth hundreds of thousands of dollars or more.
But the statute doesn’t protect every child who feels shortchanged. It applies only when the child was born or adopted after the will or trust was signed. A child who existed at the time and was simply left out often doesn’t qualify, except in some rare cases where a father was unaware of a child’s birth and might otherwise have included them. California law respects a parent’s right to disinherit, as long as the omission was knowing.
When The Presumption Breaks Down
The presumption of accidental omission isn’t bulletproof. Probate Code section 21621 lists exceptions. If the parent intentionally omitted the child and the estate plan makes that intent clear, the statute doesn’t apply. If the parent provided for the child outside the will or trust, through a life insurance policy, a joint account, or a direct gift meant to substitute for an inheritance, the child’s claim may also fail.
These exceptions become the center of litigation. Named beneficiaries who stand to lose money will argue that the parent knew about the child and chose to leave them out. They’ll point to conversations, letters, even the timing of estate plan amendments. The omitted child’s side will counter that silence in the document proves the omission was unintentional, that no outside provision was actually made, or that what was provided doesn’t satisfy the statutory standard.
We see this fight most often in blended families. A father has two children from his first marriage, remarries, and has a third child with his second wife. The trust was drafted during the first marriage and never touched again. The two older children may argue that their father deliberately kept the estate plan as it was. The younger child may argue that the trust predates her existence by a decade and that her father simply didn’t get around to updating it. Which side wins may depend on the evidence.
Spousal Protections: The Omitted Spouse
Spouses get a different but related set of protections. Under Probate Code sections 21610 through 21612, a surviving spouse who married the decedent after the most recent will or trust was executed may claim a share of the estate, even if the document leaves them nothing.
Like the pretermitted child rules, the statute presumes the omission was accidental. If your father married someone after signing his will or trust and never amended it to include or exclude the new spouse, the surviving spouse can claim assets equal to what she would have received under intestate succession. In California, that may mean the entire community property estate and up to one-half or one-third of the deceased spouse’s separate property, depending on whether the decedent left children or other surviving relatives.
That’s a massive redistribution. In estates worth several million dollars, the difference between what the trust says and what the surviving spouse claims under section 21610 can be seven figures.
Exceptions For Surviving Spouses
The same statute carves out exceptions. If the surviving spouse was intentionally omitted and the trust says so, the claim fails. If the spouse waived rights through a prenuptial or postnuptial agreement, that waiver typically controls. And if the decedent provided for the spouse outside the estate plan through beneficiary designations, joint tenancy, or other transfers, a court may find the omission was deliberate and adequately compensated.
In practice, these exceptions generate intense disputes. Named beneficiaries will scour the estate plan for any language suggesting intentional exclusion. They’ll argue a prenuptial agreement covered the issue, or that the decedent’s decision not to amend the trust after marriage was itself a deliberate choice. Surviving spouses counter that silence means the decedent simply didn’t update the documents, and that whatever they received outside the trust was given for reasons having nothing to do with estate planning.
How These Cases Are Actually Litigated
Omitted heir and omitted spouse disputes concerning wills or intestacy may begin with a petition in probate code under Probate Code section 11700 to determine heirship. In the case of a trust, the dispute may begin with a petition for instructions filed in probate court under Probate Code section 17200. The petitioner asks the court to determine that they qualify as a pretermitted child or omitted spouse and to order distribution of their statutory share.
The key evidence is usually extrinsic: what was the decedent’s intent? Attorneys may dig into the drafting history of the estate plan, correspondence with estate planning lawyers, family communications, financial records showing any transfers or gifts to the omitted person, and witness testimony about the decedent’s statements and family relationships. Deposition testimony from the estate planning attorney who drafted the documents can be decisive, because that attorney may be the only person who discussed the plan with the decedent in detail.
Mediation resolves many of these cases. The legal question is often close enough that both sides see risk, and families may prefer a negotiated outcome rather than asking a judge to decide what their parent or spouse intended. That said, when the amounts are large and the evidence is genuinely disputed, these cases often go to trial. Judges decide on who should inherit the assets based on the documentary record and the credibility of the witnesses.
A Practical Scenario
A woman creates a revocable trust in 2010 when she has one adult son. She leaves everything to him. In 2013 she remarries. In 2016 she has a daughter with her new husband. She never amends the trust. She dies in 2024.
Her husband and daughter both have potential omitted heir claims. The husband may qualify as an omitted spouse under section 21610 because the marriage postdates the trust. The daughter may qualify as a pretermitted child under section 21620 because she was born after the trust was executed. The son, who expected to inherit everything, may now face claims that could consume well over half the estate. Whether those claims succeed depends on whether the court finds the omissions were intentional and whether the decedent provided for her husband and daughter through other means.
How Trust Law Partners Can Help
At Trust Law Partners, we represent both omitted heirs pursuing their statutory rights and named beneficiaries defending against these claims. These cases turn on evidence of intent, and building that evidentiary record requires careful litigation and trial preparation, including depositions of estate planning attorneys, analysis of drafting history, financial tracing of outside gifts, and witness testimony about family dynamics.
If you were left out of a parent’s or spouse’s estate plan and believe the omission was unintentional, or if you’re a named beneficiary facing an omitted heir claim asserted by others, then the sooner you understand your rights and options the better your position will be.
Call Trust Law Partners today for a free consultation at 833-982-2079.