What Is Will Reformation Under California Law?
If you’ve ever wondered whether a court can fix a mistake in someone’s will after they’ve died, the answer used to be a flat no. Will reformation in California changed that in 2015, and the shift matters just as much to a person settling a parent’s estate as it does to anyone studying for the California Bar Exam.
Will reformation is the court-ordered rewriting of a will’s actual language, even when that language is perfectly clear on its face, to match what clear and convincing evidence shows the testator truly intended. It is different from simply interpreting a confusing clause — reformation changes the words themselves.
The Old Rule vs. Estate of Duke
For decades, California followed the traditional common-law position: courts would not touch an unambiguous will, no matter how obviously it botched the testator’s wishes. Extrinsic evidence (testimony, letters, drafts) was admissible only to resolve an ambiguity — never to rewrite plain language. Judges worried that reformation would let people rewrite a decedent’s wishes based on unreliable testimony.
Estate of Duke (2015) 61 Cal.4th 871 broke with that rule. In Duke, a holographic will left everything to the testator’s wife, with a gift-over to charities only “if we die at the same moment.” The wife died decades before the testator, and the will simply didn’t address that scenario. Lower courts sent the estate to intestacy because the will’s text didn’t cover the gap. The California Supreme Court reversed, holding that a will — even one with no ambiguity at all — may be reformed if clear and convincing evidence establishes two things:
- A mistake of law or fact in how the will expressed the testator’s intent, and
- What the testator’s actual, specific intent was.
That second requirement is the trap. Proving the testator “probably wanted to address this” isn’t enough — you need evidence of the specific substitute disposition the testator would have chosen.
Latent vs. Patent Ambiguity: California Rejects the Split
Separate from reformation is the older doctrine of interpreting ambiguous language. Cal. Probate Code § 6111.5 lets courts use extrinsic evidence to resolve ambiguity and determine whether mistake affected a will’s terms. California draws no line between:
- Latent ambiguity — the will looks clear until outside facts reveal a conflict (e.g., “my house to my son Michael,” but the testator had two sons, one named Michael who died young and one nicknamed Michael).
- Patent ambiguity — the confusion is obvious from the document itself (e.g., “$5,000 or $10,000 to my sister”).
Many states still limit extrinsic evidence to latent ambiguities only, reasoning that a patent ambiguity is the testator’s own drafting failure. California rejects that limitation entirely — extrinsic evidence comes in for both.
Equivocation vs. Non-Identification
Two related but distinct problems show up constantly on exams:
- Equivocation — a description fits two or more people or things equally well (two aunts, both named Mary).
- Non-identification — a description fits no one at all (a gift to “my cousin Sam” when the testator has a cousin Stan and an unrelated friend named Sam).
Courts try to resolve either problem with extrinsic evidence — correspondence, financial support patterns, or the testator’s habitual nicknames. If no resolution is possible, the gift simply fails and drops into the residuary clause or intestacy.
Omissions vs. Additions: Why This Still Matters
Mistake doctrine has always treated omissions and additions asymmetrically, and Duke only partly changed that.
| Type of Mistake | Pre-Duke Rule | Post-Duke Rule |
|---|---|---|
| Addition (erroneous language present) | Could be struck if clearly wrong | Still can be struck; now also correctable via reformation |
| Omission (language testator never included) | No remedy, except dependent relative revocation | Can be filled via reformation, with clear and convincing evidence of both mistake and specific intent |
| Unambiguous but wrong text | No remedy at all | Reformation available under Duke |
Worked Example: The Two Nephews
Here’s a fact pattern in the classic bar-exam style. Testator Raj executes a will leaving “$50,000 to my nephew David.” Raj has two nephews named David — one from his late brother’s family, one from his wife’s side. Raj had no meaningful relationship with the second David and, for years, referred only to the first David as “my David” in letters and to his estate attorney.
This is equivocation, not non-identification, because the description fits two people. A court will admit extrinsic evidence — the letters, the attorney’s notes, family testimony — to determine which David Raj meant. If the evidence clearly points to the first David, he takes the $50,000. If the evidence is genuinely inconclusive, the gift lapses to the residuary clause.
Now change the facts: Raj’s will says nothing at all about what happens if both Davids predecease him, and both do. That’s an omission. Before 2015, nothing could be done — the gap simply passed by intestacy. After Duke, if Raj’s family can show by clear and convincing evidence exactly who Raj would have named instead (say, a letter naming a specific charity as backup), a court can now reform the will to supply that missing disposition.
Reformation, Interpretation, and Harmless Error: Don’t Confuse Them
Bar exam answers frequently mix up three separate remedies. Interpretation (§ 6111.5) resolves ambiguous wording without changing the words. Reformation (Duke) rewrites unambiguous wording that doesn’t match intent. The harmless-error rule (Probate Code § 6110(c)(2)) is different still — it excuses defects in how a will was executed (missing a witness signature, for example), not mistakes in its content. Keep these three straight, because mixing them up is one of the most common errors on wills essays.
Frequently Asked Questions
Can a California court change the words of a will if it’s not ambiguous?
Yes. Since Estate of Duke (2015) 61 Cal.4th 871, California courts can reform even an unambiguous will if clear and convincing evidence shows both a mistake in expression and the testator’s actual, specific intent.
What’s the difference between equivocation and non-identification?
Equivocation is when a description matches two or more people or things equally well. Non-identification is when a description matches nobody or nothing at all. Both can be resolved with extrinsic evidence, but if the ambiguity can’t be resolved, the gift in a non-identification case usually fails outright.
Does California limit extrinsic evidence to hidden (latent) ambiguities?
No. Under Cal. Probate Code § 6111.5, California admits extrinsic evidence for both latent and patent ambiguities, rejecting the older common-law rule that reserved extrinsic evidence for latent ambiguities only.
Key Takeaways
- Reformation lets a California court rewrite even an unambiguous will’s language, but only with clear and convincing evidence of a mistake and the testator’s specific actual intent (Estate of Duke, 2015).
- California admits extrinsic evidence for both latent and patent ambiguities — there’s no special protection for errors visible on the document’s face.
- Equivocation (two matches) and non-identification (no match) are different problems with different likely outcomes.
- Omissions in a will can now be filled through reformation post-Duke; before 2015, they had no remedy outside dependent relative revocation.
- Keep reformation, interpretation, and the harmless-error rule separate — they solve different problems and require different proof.
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.
Related guides
- dependent relative revocation
- cancellation and interlineation
- lost or mutilated wills
- will execution requirements