Form DE-131, called the Proof of Subscribing Witness, is the sworn statement a person who watched someone sign a will uses to confirm the will is real during California probate. You use it when the will is not “self-proving,” meaning it does not already include a notarized attestation that meets California Probate Code § 8220.
A 2024 AARP survey found that only 32% of American adults have a will, and California probate courts process tens of thousands of estates each year, many with wills that are not self-proving. That gap is why DE-131 matters: without a properly filed proof, a judge can refuse to admit the will, and your loved one’s wishes may not control who inherits.
Here is what you will learn in this guide:
- 📝 How to fill out every line of Judicial Council Form DE-131 without errors
- ⚖️ When DE-131 is required versus when DE-132 for holographic wills applies
- 🧑⚖️ Real California cases like Estate of Saueressig that show what happens when proof goes wrong
- 🚫 The seven most common mistakes that delay probate or cost the estate money
- ✅ Step-by-step examples featuring named filers in Los Angeles, San Diego, and Sacramento
What Form DE-131 Is and Why California Requires It
Form DE-131 is a one-page Judicial Council form used in California probate to prove that a will was properly signed under Probate Code § 6110. The form is signed under penalty of perjury by a person who watched the testator sign or who heard the testator acknowledge the signature. California requires this proof because, unlike many states, the state does not always require a notarized self-proving affidavit attached to the will.
When a will lacks a self-proving clause that meets Probate Code § 8220, the court needs sworn evidence from at least one witness before it admits the will. That sworn evidence comes from DE-131. The plain-English idea is simple: the court wants someone alive and credible to say, “Yes, I saw this happen, and the person knew what they were signing.”
The consequence of skipping this step is severe. A court that has no valid proof can deny probate of the will and treat the estate as if no will existed. That outcome triggers California’s intestate succession rules, which may send property to relatives the testator did not want to benefit.
A real-world example shows the stakes. Imagine Diego, a widower in Fresno, who left a typed will naming a close friend as his sole heir. If no witness signs DE-131, the friend gets nothing, and Diego’s estranged brother inherits under intestacy. A common misconception is that a notary stamp on the will alone is enough; in California, notarization does not substitute for the witness requirement under Probate Code § 6110(c)(1).
Federal Versus California Rules on Wills
Federal law does not control how state probate courts admit wills, because probate is a matter of state jurisdiction under longstanding doctrine recognized by the U.S. Supreme Court in Markham v. Allen. That means the only rules that decide whether DE-131 is needed are California statutes and local court rules. Federal estate tax filings under IRS Form 706 operate on a separate track and do not replace state proof requirements.
The plain-English meaning is that even if the IRS already accepts the estate’s tax position, the California probate judge still needs DE-131 before the will controls who gets what. The consequence of confusing these systems is wasted time and possible loss of the will’s validity. A short scenario: Aisha, an executor in San Diego, finishes the federal Form 706 and assumes probate is done; the Superior Court still rejects the will because she never filed DE-131.
Self-Proving Wills Versus Witness-Proved Wills
A self-proving will under Probate Code § 8220(b) includes a notarized attestation declaring the witnesses’ statements at the time of signing. When a will is self-proving, the court can admit it without DE-131. When the will lacks that clause, you must use DE-131 or seek a court order under Probate Code § 8221 for proof by other evidence.
The consequence of treating a witness-proved will like a self-proving one is delay. A judge will continue the hearing, often four to six weeks, until proof arrives. A common misconception is that any sworn statement works; California requires the specific Judicial Council form unless the court accepts a substitute under local rules like Los Angeles Superior Court Local Rule 4.35.
When You Must File DE-131 (and When You Should Not)
You file DE-131 when the decedent left a typed, witnessed will that does not include a self-proving clause meeting Probate Code § 8220. The form is filed alongside the Petition for Probate (DE-111) and the original will. You do not file DE-131 when the will is fully self-proving, when the will is holographic, or when no subscribing witness is reasonably available.
The plain-English rule is: typed will + live witness + no notarized self-proving block = file DE-131. The consequence of filing the wrong proof form is a court rejection notice that adds weeks to your timeline. A short example: Marcus, a son in Oakland, files DE-131 for his mother’s handwritten will; the clerk rejects it because handwritten wills require DE-132 instead.
Holographic Wills and Form DE-132
A holographic will under Probate Code § 6111 is one in which the signature and material provisions are in the testator’s own handwriting. Holographic wills do not need witnesses, so DE-131 does not apply. Instead, you use Form DE-132, Proof of Holographic Instrument, in which someone familiar with the decedent’s handwriting swears that the writing is authentic.
The consequence of using DE-131 instead of DE-132 is that the court will reject the proof outright because the legal basis is wrong. A common misconception is that a witness who saw the holographic will being written should sign DE-131; the right form is still DE-132 because the law focuses on handwriting, not witnesses.
When No Subscribing Witness Is Available
If both witnesses have died, moved abroad, or cannot be located after a reasonable search, Probate Code § 8221 lets the court accept other evidence. Other evidence often includes a declaration about the testator’s handwriting, expert handwriting analysis, or testimony from someone present during execution. You still must explain the unavailability in a separate declaration, not in DE-131 itself.
The consequence of forgetting this fallback is that the petitioner gives up too soon and accepts intestacy. A real-world scenario: Helen in Sacramento finds her late father’s 1998 will, but both witnesses have passed away; she files a § 8221 motion with handwriting evidence rather than DE-131, and the court admits the will.
Step-by-Step: How to Fill Out Form DE-131 Line by Line
The current revision of Form DE-131 is a single page with a caption, six numbered items, and a signature block. You complete the form in black ink or by typing, then the witness signs under penalty of perjury. Filing happens at the Superior Court of the county where probate is opened, often through the California Courts eFiling portal when local rules allow.
Below is a walk-through of every field. Each field is followed by the plain-English meaning, the consequence of getting it wrong, and a short example.
Caption: Attorney or Party Without Attorney
The top box asks for the name, address, and State Bar number of the attorney, or the name and address of the party filing without an attorney. You also list the court name, branch, and case number once assigned. The plain-English meaning is that the court must know who is responsible for the filing and where to send notices.
The consequence of a wrong or missing case number is that the clerk may reject the filing or place it in the wrong file. A common mistake is using the decedent’s address; you must use the filer’s address. Example: Priya in San Jose lists her own attorney’s State Bar number, the Santa Clara County Superior Court Probate Division, and the case number from her DE-111 stamp.
Item 1: Identification of the Will
Item 1 asks the witness to identify the document being proved. The witness states that the attached document is the will of the decedent and lists the date the will was signed. The plain-English meaning is that the witness is matching the paper in front of the court to the paper they remember signing.
The consequence of a wrong date is a hearing continuance until the witness corrects the form. A common misconception is that you can leave the date blank; California courts treat a blank date as a fatal defect. Example: Carlos, a witness in Long Beach, writes “March 14, 2018” because that is the day he saw Mr. Rivera sign the will.
Item 2: Statement About the Testator’s Signature
Item 2 has two checkboxes. Box 2a says the witness saw the testator sign the will. Box 2b says the testator acknowledged to the witness that the signature on the will was the testator’s. You check only the box that is true.
The consequence of checking both boxes is that the court may treat the proof as inconsistent and request a new declaration. A common mistake is assuming “I knew his signature” is the same as “he acknowledged it”; California requires the testator’s own statement, not the witness’s recognition. Example: Linh in Garden Grove checks Box 2b because the testator told her, “That’s my signature,” even though she did not see the pen touch paper.
Item 3: Testator’s Capacity and Voluntariness
Item 3 asks the witness to state that, when the will was signed, the testator appeared to be of sound mind and not acting under fraud, duress, menace, or undue influence. The plain-English meaning is that the witness believes the testator understood what was happening and was making a free choice. This requirement comes from Probate Code § 6104.
The consequence of leaving this blank or qualifying the answer is a will contest under Probate Code § 8250. A common misconception is that “sound mind” requires perfect memory; the legal test is much lower and was clarified in Andersen v. Hunt (2011) 196 Cal.App.4th 722. Example: Robert, a longtime neighbor, signs item 3 because the testator joked normally and named all four grandchildren before signing.
Item 4: Age of the Testator
Item 4 asks the witness to confirm that the testator was at least 18 years old at the time the will was executed, as required by Probate Code § 6100. The plain-English meaning is that minors generally cannot make wills in California. The consequence of a missing item 4 is the same as item 3: the court cannot find the will valid on its face.
A common misconception is that emancipated minors can skip this requirement; California still requires age 18 unless a narrow exception applies. Example: Sofia, a witness in Bakersfield, checks item 4 because she has known the testator since college and knows he was 67 when he signed.
Item 5: Subscribing Witness and Other Witness
Item 5 says the witness signing DE-131 is one of the witnesses to the will and that another witness also signed in the testator’s presence. The plain-English meaning is that California requires two witnesses under Probate Code § 6110(c)(1), even though only one needs to file DE-131.
The consequence of admitting the second witness was not present is that the will fails the formal execution test. A common mistake is checking item 5 when the second “witness” actually signed the next day; that is not lawful execution. Example: Janelle in Riverside confirms item 5 because she and her coworker both signed in Ms. Park’s living room within minutes of each other.
Item 6: Date and Signature Block
Item 6 contains the date of the declaration, the typed name and signature of the witness, and the city and state where the declaration is signed. The signature is made under penalty of perjury under the laws of California, as required by Code of Civil Procedure § 2015.5.
The consequence of an unsigned form is automatic rejection by the clerk. A common misconception is that notarization replaces the penalty-of-perjury statement; California specifically authorizes the unsworn declaration in lieu of notarization. Example: Trevor signs in San Francisco on May 4, 2026, prints his name, and writes “San Francisco, California” above the signature line.
Three Common Filing Scenarios With Outcomes
Below are the three most common DE-131 fact patterns drawn from California probate practice. Each table shows the filer’s situation and what happens at the hearing.
Scenario A: Attorney-Drafted Will Without Self-Proving Clause
| Filer’s Situation | Court’s Response |
|---|---|
| Will typed by attorney in 2015, signed by two witnesses, no notarized self-proving clause attached. | Court admits will after one witness files DE-131 with all six items checked. |
| Witness lives in another state and signs DE-131 remotely. | Court accepts the form because California allows declarations under penalty of perjury from anywhere. |
| Petitioner files DE-131 on the morning of the hearing. | Court continues the hearing because Local Rule 7.1 requires filing in advance. |
Scenario B: Witness Cannot Remember the Signing
| Filer’s Situation | Court’s Response |
|---|---|
| Witness checks item 2b but leaves item 3 blank because she “doesn’t remember.” | Court rejects the proof and asks for a new DE-131 or a § 8221 declaration. |
| Witness writes “I think so” next to capacity language. | Court treats the qualification as insufficient and orders a hearing on capacity. |
| Petitioner abandons DE-131 and uses Probate Code § 8221 instead. | Court accepts handwriting expert and admits will. |
Scenario C: Both Witnesses Have Died
| Filer’s Situation | Court’s Response |
|---|---|
| Petitioner files DE-131 anyway, signed by a friend who was not present. | Court rejects because friend was never a subscribing witness. |
| Petitioner files declaration about decedent’s handwriting under § 8221. | Court admits will after reviewing handwriting evidence. |
| Petitioner asks to set the will aside and proceed under intestacy. | Court issues letters of administration without a will. |
Three Named Examples That Illustrate the Form in Action
These examples follow named filers from start to finish so the steps feel concrete. Each one assumes the original will is in hand and the Petition for Probate (DE-111) is already filed.
Example 1: Maria in Los Angeles County
Maria files probate for her late mother, whose 2019 will was typed by an estate attorney but never made self-proving. Maria contacts Tom, the longtime accountant who signed as a witness, and emails him a blank DE-131. Tom checks item 2a because he watched the signing in his office, completes items 3 through 5, signs and dates item 6 in Pasadena, and mails the original back to Maria.
Maria files the original DE-131 with the Los Angeles Superior Court Stanley Mosk Courthouse probate division at least 15 days before the hearing. The court admits the will at the May 2026 hearing without continuance, and Maria receives Letters Testamentary the same day.
Example 2: Jamal in San Diego County
Jamal discovers his uncle’s typed 2010 will in a safe deposit box. Only one witness, Linda, is still alive; the other passed away in 2022. Linda completes DE-131 truthfully, and Jamal also files a separate declaration explaining the death of the second witness with a certified death certificate.
Because Linda’s DE-131 alone satisfies Probate Code § 8220, the San Diego Superior Court admits the will, and the second witness’s death is not a barrier. Jamal saves several months he would have lost to a § 8221 motion.
Example 3: Aiko in Sacramento County
Aiko is filing for her father, whose 2005 will is typed but the witnesses have moved out of the country and cannot be reached after months of searching. Aiko skips DE-131 entirely and instead files a Probate Code § 8221 motion, attaching a handwriting expert’s declaration and her own affidavit about the search.
The Sacramento Superior Court probate department admits the will after a brief evidentiary hearing. Aiko’s strategy mirrors how the Estate of Saueressig situation was handled by California courts when traditional witness proof was impossible.
Mistakes to Avoid When Filing DE-131
Avoiding these errors protects the will, the executor, and the family. Each mistake includes the negative outcome that follows.
- Using DE-131 for a holographic will, which causes outright rejection because DE-132 is the proper form
- Leaving item 3 blank, which gives a contestant grounds to challenge capacity under Probate Code § 8252
- Checking both 2a and 2b, which creates inconsistency and forces a corrected filing
- Filing a photocopy of DE-131 instead of the original, which most counties reject under their local rules
- Forgetting the city and state on the signature line, which voids the CCP § 2015.5 declaration format
- Filing DE-131 without first filing the Petition for Probate (DE-111), which leaves no case number for the proof to attach to
- Using a witness who was not a subscribing witness, which makes the entire proof legally void
Do’s and Don’ts for Witnesses Signing DE-131
Witnesses carry personal liability for false statements, so these rules matter for them too.
- Do read the will once more before signing, so memory matches reality
- Do sign in black ink and print your name legibly so the clerk can match records
- Do consult a probate attorney through the California State Bar referral service if any field is unclear
- Do keep a copy of the signed DE-131 for your own records in case of a contest
- Do confirm the testator’s age and mental state by recalling specific facts
- Don’t sign if you cannot honestly check items 3 through 5 in full
- Don’t add handwritten notes or qualifications; California courts treat hedging as a defect
- Don’t notarize the form; a penalty-of-perjury declaration is what California requires
- Don’t backdate the signature, because backdating is perjury under Penal Code § 118
- Don’t discuss the contents with beneficiaries before signing, because that can suggest undue influence
Pros and Cons of Using DE-131
Understanding the trade-offs helps families decide whether to seek a witness or pursue § 8221 evidence.
- Pro: DE-131 is free to file with the will and adds no separate filing fee
- Pro: Most California counties accept DE-131 without a court hearing on the proof
- Pro: A single witness can satisfy Probate Code § 8220, keeping the process simple
- Pro: The form’s plain language reduces the need for attorney review
- Pro: Filing DE-131 early prevents a continuance at the first probate hearing
- Con: The form depends on a witness’s memory, which fades over time
- Con: Witnesses who refuse to sign can stall probate for months
- Con: A defective DE-131 invites will contests and increases legal fees
- Con: Out-of-state witnesses sometimes hesitate to sign under California’s penalty-of-perjury format
- Con: The form does not cover holographic wills, requiring families to know which form fits
Key Court Rulings That Shape DE-131 Practice
Several California decisions clarify how courts treat witness proof. Estate of Saueressig (2006) 38 Cal.4th 1045 held that a will requires two witnesses present at the time of signing and that post-death subscription does not save a defective execution. The consequence is that DE-131 cannot rescue a will signed by only one witness.
Estate of Stoker (2011) 193 Cal.App.4th 236 confirmed that Probate Code § 6110(c)(2) lets a court admit a defectively executed will if the proponent shows by clear and convincing evidence that the testator intended the document to be a will. The plain-English meaning is that DE-131 is not the only path; § 6110(c)(2) gives a backup when the form is unavailable.
Andersen v. Hunt (2011) 196 Cal.App.4th 722 set the modern standard for testamentary capacity. The opinion clarified that the test under Probate Code § 6100.5 is lower than the standard for contracts, so a witness can comfortably check item 3 even when the testator was elderly or ill, as long as the testator understood the will’s nature and effect.
Comparing DE-131 to Related Probate Forms
Knowing how DE-131 fits with other Judicial Council forms prevents misfiling.
| Form and Use | Key Difference |
|---|---|
| DE-111 Petition for Probate, opens probate | Filed by petitioner, not by a witness |
| DE-121 Notice of Petition, notifies heirs | Concerns service, not will validity |
| DE-131 Proof of Subscribing Witness, proves typed will | Requires a subscribing witness signature |
| DE-132 Proof of Holographic Instrument, proves handwritten will | Requires handwriting familiarity, not witness presence |
| DE-147 Duties and Liabilities, explains executor role | Signed by executor, not witness |
Filing Logistics, Fees, and Timing
DE-131 is filed without a separate fee in most California counties because it is part of the probate packet, but the underlying DE-111 petition costs $435 statewide as of 2026. Some counties, like San Francisco Superior Court, require electronic filing through their portal, while others still accept paper. Always check the local court’s fee schedule before mailing.
Most counties want DE-131 filed at least 15 court days before the first hearing, matching the notice rules in Probate Code § 8003. Filing late often forces a continuance, adding four to six weeks. If the witness lives far away, build extra time into the schedule for the original signature to travel by mail.
The plain-English takeaway is that paperwork timing controls the entire probate calendar. A real-world example: Nora in Marin County emails DE-131 to a witness on a Friday and assumes it will arrive in time; the witness mails it the following Wednesday, and the court continues the hearing because the original arrived two days late.
How DE-131 Interacts With Will Contests
A will contest under Probate Code § 8250 lets an interested person challenge the will’s validity within 120 days of admission. A clean DE-131 makes contests harder because the court already has sworn evidence of due execution and capacity. A sloppy DE-131 invites contestants to depose the witness and probe each item.
The consequence of a contested DE-131 is rising legal costs, often $25,000 or more in attorney’s fees, plus delays of a year or longer. A common misconception is that the executor must defend the will personally; the estate generally pays defense costs under Probate Code § 11003. Example: David in Orange County faces a contest because his DE-131 has a blank item 3, and the contestant argues capacity was not proven.
FAQs
Do I have to file DE-131 if the will is notarized?
Yes. Notarization alone does not satisfy Probate Code § 8220; the will must include the specific self-proving language, or you must still file DE-131 from a subscribing witness.
Can a beneficiary sign DE-131 as the witness?
Yes, but it can void or reduce that beneficiary’s gift under Probate Code § 6112 unless two other disinterested witnesses also signed the will, so most attorneys advise against it.
Is DE-131 required for holographic wills?
No. Holographic wills are proved with Form DE-132 because Probate Code § 6111 does not require witnesses for handwritten wills.
Can DE-131 be signed electronically?
Yes, in counties that accept e-filing, electronic signatures meeting Code of Civil Procedure § 1010.6 are valid, though many courts still prefer the original wet-ink form.
Does the witness need to appear in court?
No. A properly completed DE-131 usually replaces live testimony, although the court can order the witness to appear if a will contest under Probate Code § 8250 is filed.
Can both witnesses file DE-131 together?
Yes, though only one is required; filing two strengthens the record and helps if a contest later challenges the will under Probate Code § 8252.
What if the witness lives outside California?
Yes, an out-of-state witness can sign DE-131 because the Code of Civil Procedure § 2015.5 declaration applies to anyone signing under California law, anywhere.
Is there a deadline to file DE-131?
Yes, you should file it before the first probate hearing, generally within the timing rules of Probate Code § 8003, or the court will continue the matter.
Can I fill out DE-131 in pencil?
No. California courts require black or blue ink or typed entries; pencil entries are rejected by the clerk under standard Judicial Council form rules.
Does filing DE-131 cost extra money?
No, the form itself carries no separate fee; only the underlying Petition for Probate filing fee of $435 applies in 2026.
Can a witness change a DE-131 after filing?
Yes, by filing an amended DE-131 with corrections, but only before the will is admitted; afterward, you must seek a court order under Probate Code § 8226.
Do I need a lawyer to file DE-131?
No, self-represented petitioners can file DE-131 using the free California Courts Self-Help Center, although complex estates often benefit from a probate attorney’s review.
Related reading
- Does California Recognize a Simple Will? (w/Examples) + FAQs
- Does California Recognize Self-Proving Wills? (w/Examples) + FAQs
- How to Fill Out California Form DE-111 (w/Examples) + FAQs
- How to Fill Out California Form DE-121 (w/Examples) + FAQs
- How to Fill Out California Form DE-160 (w/Examples) + FAQs
- How to Fill Out California Form DE-265 (w/Examples) + FAQs
- How to Fill Out California Form GC-200 (w/Examples) + FAQs