How to Fill Out California Form DE-121 (w/Examples) + FAQs

California Form DE-121, the Notice of Hearing—Decedent’s Estate or Trust, is the official Judicial Council document used to tell heirs, beneficiaries, and creditors that a probate or trust matter has a court hearing scheduled. You fill it out by entering the case caption, the petitioner’s information, the hearing date, time, department, and address, then attaching it to a proper proof of service that confirms each interested party received the notice at least 15 days before the hearing.

Missing one heir, mailing the notice 14 days before the hearing instead of 15, or signing the proof of service yourself as the petitioner can void the entire hearing and force a continuance. According to the Judicial Council’s 2024 Court Statistics Report, California Superior Courts processed more than 38,000 probate filings in fiscal year 2022–2023, and a significant share were delayed because of defective notice under Probate Code § 1220.

Here is what you will learn in this guide:

📝 How to complete every line, box, and attachment on Form DE-121 without triggering rejection at the clerk’s window
⏰ The exact statutory deadlines for serving notice under Probate Code § 8100 and the consequences of missing them by even one day
👥 Who must receive the notice, including out-of-state heirs, contingent beneficiaries, and the Attorney General in charitable trust matters
⚖️ How DE-121 works alongside related forms like DE-111, DE-120, DE-115, and the proof of service on the reverse side
🏛️ The county-by-county local rule traps in Los Angeles, Orange County, San Diego, and San Francisco that derail otherwise valid notices

What California Form DE-121 Actually Is

Form DE-121 is the standardized Notice of Hearing—Decedent’s Estate or Trust adopted by the Judicial Council of California under California Rules of Court, Rule 7.51. The form gives every interested person legal notice that a petition affecting a decedent’s estate or a trust will be heard by the probate court on a specific date. It is mandatory in most probate proceedings governed by Division 3 of the California Probate Code.

The plain-English meaning is simple: the court will not hear your petition unless every person with a legal stake in the outcome has been told when and where the hearing will happen. The consequence of skipping or botching this step is that the judge will continue the hearing, and you will pay another filing fee, lose weeks or months, and possibly face an objection from a beneficiary who claims the defect prejudiced their rights. A real example is In re Estate of Earley, where defective notice led to a probate order being set aside on appeal because one heir never received the mailed notice. A common misconception is that emailing a copy of DE-121 to family members satisfies the rule, but Probate Code § 1215 requires personal delivery or first-class mail unless the recipient consents in writing to electronic service.

The form has two sides. The front side is the notice itself, telling readers about the hearing. The back side is the proof of service, where a non-party adult swears under penalty of perjury that copies were mailed or personally delivered. You file the original with the clerk before the hearing and keep a stamped copy for your records.

Federal vs. California Notice Rules

Federal probate does not exist for ordinary estates because probate is exclusively a state matter under the probate exception to federal jurisdiction recognized in Marshall v. Marshall, 547 U.S. 293 (2006). Federal courts only touch decedents’ estates in narrow situations, like federal tax liens through the IRS Form 706 estate tax process or ERISA claims against retirement plans. The consequence is that California controls every notice rule that applies to DE-121.

California layers its own statutes on top. Probate Code § 1220 sets the master rule that notice must be given at least 15 days before the hearing. Probate Code § 17203 controls notice for trust petitions filed under the Probate Code § 17200 jurisdiction. A common mistake is assuming the federal mailbox rule applies; it does not, because California measures the 15 days from the date of mailing, not the date of receipt.

Who Must File and Use DE-121

Any person who files a petition affecting a decedent’s estate or a trust must serve DE-121 on every interested party. This includes the petitioner for probate of a will, an administrator seeking letters of administration, a beneficiary contesting accounting, a trustee seeking instructions, or a creditor filing a DE-172 Creditor’s Claim related petition. The list of interested parties comes from Probate Code § 48, and it includes heirs, devisees, children, spouses, creditors, and anyone else with a property right in the estate.

The consequence of leaving someone out is severe. Under Probate Code § 8110, every heir at law must receive the notice for an initial probate petition, even ones the petitioner has never met. A real-world example involves Maria, a daughter who filed to probate her mother’s will but forgot to notice her estranged half-brother in Texas; the court vacated the order admitting the will after he objected, costing her four months and over $2,500 in additional attorney fees and republication costs.

Charitable trusts trigger an extra rule. Under Probate Code § 17210 and Government Code § 12591, the California Attorney General’s Charitable Trusts Section must receive notice when a charity is a beneficiary. Skipping this step makes any order unenforceable against the charity.

When the Form Is Triggered

DE-121 is triggered any time a petition needs a court hearing. The most common trigger is the initial petition for probate filed on Form DE-111. Other triggers include petitions to confirm a real estate sale on DE-260, petitions for final distribution, petitions to remove a personal representative, and petitions under Probate Code § 850 to recover estate property.

The consequence of using the wrong form is rejection by the clerk. The Judicial Council also publishes DE-122, a different Notice of Hearing—Guardianship or Conservatorship, which looks similar but cannot be used for decedent’s estates. A common misconception is that DE-120, the Notice of Hearing—Trust, replaces DE-121; in fact DE-120 is used only in certain niche trust proceedings, while DE-121 covers the broader range of decedent’s estate and trust matters governed by Probate Code § 17200.

Step-by-Step: Filling Out the Front of DE-121

The front of Form DE-121 has six numbered sections plus a caption. Every line matters because the clerk’s office and the probate examiner will reject a form with even small errors. Here is exactly what to enter.

The Caption Box

The top-left caption is for the attorney or party without attorney. Enter the full legal name, State Bar of California number if applicable, firm name, mailing address, telephone, fax, and email. If you are self-represented, write In Pro Per or Self-Represented in the bar number space. The “Attorney for” line should say “Petitioner” if you filed the underlying petition.

The consequence of leaving the bar number blank when an attorney signs is automatic rejection in counties like Los Angeles, where the LASC Local Rules require it. A common mistake is using a P.O. box without a physical service address; many courts demand both. For example, David, a petitioner in San Diego, had his hearing continued because his caption listed only a UPS Store mailbox, which the San Diego Superior Court Local Rules treat as insufficient for service of return mail.

The Court and Case Information

Below the caption, fill in the Superior Court of California, County of [name], the court’s street address, mailing address, city, zip code, and branch name. Then write the decedent’s name exactly as it appears on the petition, including AKAs. The case number goes in the upper right; if the case is brand new and unfiled, leave it blank for the clerk to assign.

Inconsistent decedent names are a top reason probate examiners flag notices. If the will calls the decedent Robert J. Smith but the death certificate says Robert James Smith aka Bob Smith, list every variant. The consequence of mismatched names is a probate note requiring an amended notice and re-service, adding 30 days minimum to the timeline under the California Probate Examiner Notes system.

Item 1: NOTICE Statement

Item 1 is preprinted and tells the reader that a hearing has been scheduled. You do not edit this paragraph. You only need to enter the name of the petitioner in the blank, followed by a one-line description of what the petition seeks, such as Probate of Will and for Letters Testamentary or Final Distribution and Discharge.

The description must match the petition’s own title word-for-word. The consequence of a mismatched description is that beneficiaries can later argue they were misled about the nature of the hearing, opening the door to a motion to vacate under Code of Civil Procedure § 473. For example, Linda described her petition as “for distribution” when the actual filing was a “Petition for Final Distribution and Allowance of Trustee Compensation”; an objecting beneficiary successfully argued the trustee fee request was hidden, and the court struck the fee award.

Item 2: Hearing Information

Item 2 is the heart of the form. Enter the hearing date, time, department or room, and the court address. Many counties require you to obtain the hearing date from the clerk before preparing DE-121, while others assign dates at filing. In Los Angeles, you reserve a probate hearing date through the LASC Court Reservation System or by calling the probate clerk.

The consequence of guessing a date is that the clerk will reject the entire packet. A common mistake is listing the courthouse address but the wrong department; probate departments often sit in a separate building, like the Stanley Mosk Courthouse Department 9 in LA County or Department 502 at the McMonagle Family Courthouse in San Diego. Always confirm the department on the California Courts website.

Item 3: Address and Identifying Information

Item 3 lets you direct readers to a specific document or attachment if the petition raises additional matters that need flagged disclosure. This box is most often used when the petition includes a request for extraordinary fees, a sale of unique assets, or a will contest. You check the box and attach a brief summary on a MC-025 Attachment.

The consequence of skipping disclosures is that interested parties can claim due process defects. James, a personal representative in Alameda County, omitted a fee request from the DE-121 attachment; a beneficiary objected, and the court denied the entire $18,000 fee on the ground the notice did not give fair warning. A common misconception is that boilerplate language in the petition itself is enough; the notice must independently flag major requests.

Step-by-Step: Filling Out the Proof of Service

The reverse side of DE-121 contains the Proof of Service by Mail section. This is where a person 18 or older, who is not a party to the case, swears that copies of the notice and any required attachments were mailed to every interested person. Read Code of Civil Procedure § 1013a before you sign anything.

Item 1: Server Information

The server enters their name, residence or business address, and confirms they are over 18 and not a party. The petitioner cannot serve their own notice, even if they hate the cost of asking someone else. The consequence of self-service is automatic invalidation under CCP § 1013a(3), which requires service by a non-party.

A real example is Patricia, a self-represented widow in Riverside County who signed her own proof of service. The probate examiner caught it, and she had to start over with her adult neighbor as the server. The lesson: pick a friend, coworker, paralegal, or commercial attorney service like One Legal or First Legal to handle service.

Item 2: Mailing Details

The server checks the box for either deposit in the U.S. Mail or placed in firm’s mail processing. They must list the date and place of mailing. The notice must be enclosed in a sealed envelope with first-class postage prepaid and addressed to each person on the attached service list.

The consequence of a missing postmark or wrong date is that the 15-day clock under Probate Code § 1220 cannot be verified. A common mistake is mailing on Friday for a hearing 15 calendar days later that falls on a Saturday court holiday; the court computes time using CCP § 12, which excludes the day of mailing and includes the last day unless it falls on a holiday.

Item 3: List of Persons Served

Either fill in the names and addresses on the form itself or attach a separate list using DE-121(MA), the Attachment to Notice of Hearing—Proof of Service by Mail. Include the full name and complete mailing address of every person noticed, plus their relationship or status (heir, devisee, creditor, trustee).

The consequence of vague entries like “John Smith, Sacramento” is rejection. The probate examiner needs a specific street address. A common misconception is that you only need to notice people listed in the will; in fact, you must notice all heirs at law under Probate Code § 8110, even those the will disinherits, because they have standing to contest.

Three Common DE-121 Scenarios

Below are the three most frequent scenarios, shown with the action you take and the legal result that follows.

Scenario A: Initial Probate of Will

Filing Action	Legal Result
File DE-111 petition for probate with original will	Clerk assigns case number and tentative hearing date roughly 30–45 days out
Prepare DE-121 with hearing date, time, and department	Notice ready for mailing once filed
Mail DE-121 to all heirs and devisees at least 15 days before hearing	Statutory notice satisfied under § 8110 and § 1220
Publish in newspaper of general circulation per § 8120	Constructive notice to unknown creditors complete
File proof of service and proof of publication before hearing	Court can grant letters testamentary at hearing

Scenario B: Trust Petition Under § 17200

Filing Action	Legal Result
File petition under Probate Code § 17200 seeking trust instructions	Court sets hearing 30+ days out
Identify all current and contingent beneficiaries under § 17203	Service list complete
Mail DE-121 to each beneficiary at least 30 days before hearing	Trust notice rule satisfied
Notice California Attorney General if charity is beneficiary	§ 17210 compliance achieved
File proof of service before hearing	Court may grant relief requested

Scenario C: Petition for Final Distribution

Filing Action	Legal Result
Personal representative files petition for final distribution	Clerk assigns hearing date
Prepare DE-121 listing distribution petition	Notice flagging extraordinary fees, if any, attached
Mail to beneficiaries, creditors, and Franchise Tax Board if § 9202 applies	All required parties on notice
File proof of service at least 15 days before hearing	Court can sign order of distribution
Distribute estate per court order	Estate closed and PR discharged

Real-World Named Examples

Three named examples show how the form plays out in practice.

Maria’s Will Probate. Maria filed in Los Angeles County to probate her mother’s will. She forgot her estranged half-brother in Houston. He learned through a relative, hired counsel, and moved to vacate. The court agreed and required Maria to re-notice and re-publish, adding $1,200 in publication fees, $435 in additional filing-related costs, and four months of delay.

David’s Real Estate Sale. David, a personal representative in San Diego, used DE-121 to notice a confirmation of sale hearing. He listed the wrong department because the probate calendar had moved buildings the prior month. The buyer threatened to walk, and David rushed an ex parte to fix the notice; the San Diego Superior Court granted the fix only after he showed no prejudice to objectors.

Linda’s Trustee Fee Request. Linda, a successor trustee in Alameda County, attached DE-121 to a petition that buried a trustee compensation request inside the accounting. The DE-121 description said only “Petition for Settlement of Account.” A beneficiary objected, citing inadequate disclosure under § 17203, and the judge denied the entire $9,500 fee, finding the notice failed to fairly identify the relief sought.

Mistakes to Avoid

Probate examiners across California reject thousands of DE-121 forms each year for the same handful of mistakes. Avoid these.

Self-serving the notice as the petitioner, which voids service under CCP § 1013a
Mailing fewer than 15 days before the hearing, which violates Probate Code § 1220 and forces a continuance
Forgetting heirs not named in the will, which violates Probate Code § 8110 and triggers vacatur risk
Listing the wrong courthouse department, which causes interested parties to miss the hearing and creates due process defects
Omitting the California Attorney General when a charity is a beneficiary under § 17210
Using vague service addresses like “John Smith, Sacramento” instead of full street addresses
Failing to attach the DE-121(MA) when the service list is too long for the proof-of-service box
Forgetting to publish under § 8120 for initial probate, since DE-121 mailing alone is not enough
Using DE-122 for a decedent’s estate, which is the wrong form and is rejected at intake
Mismatching the decedent’s name between the death certificate, will, and DE-121 caption

Do’s and Don’ts

These rules separate clean filings from probate-note nightmares.

Do

Do confirm the hearing date and department with the clerk before printing DE-121, because clerk-assigned dates are the only valid ones
Do mail at least 16 calendar days before the hearing to give yourself a one-day buffer, because the 15-day rule excludes the day of mailing
Do use Certificate of Mailing receipts from the USPS to prove the mailing date if a beneficiary later denies receipt
Do attach DE-121(MA) when you have more than four people to notice, because the proof-of-service box is too small
Do include every AKA from the death certificate, because mismatched names trigger probate examiner notes

Don’t

Don’t sign the proof of service yourself if you are the petitioner, because non-party service is mandatory under CCP § 1013a
Don’t email DE-121 unless every recipient has consented in writing under Probate Code § 1215
Don’t skip notice to disinherited heirs, because Probate Code § 8110 requires notice regardless of will provisions
Don’t list a P.O. box as the only return address in counties with local rules requiring street service
Don’t forget Form DE-160 Inventory and Appraisal deadlines, because they often run concurrently with hearing notice timelines

Pros and Cons of DIY DE-121 Filing

Self-represented petitioners often weigh whether to handle DE-121 themselves or hire counsel.

Pros

Saves the $300–$600 attorney fee a paralegal service or lawyer would charge for the form
Builds familiarity with the probate process for petitioners managing simple estates
Gives the petitioner direct control over the service list and timing
Avoids the statutory attorney fee bump that comes with bringing on counsel later
Leverages free California Courts Self-Help resources for guidance

Cons

A defective notice forces a continuance that can erase any DIY savings through new filing fees and delays
Probate examiners do not give legal advice, so DIY filers must figure out objections themselves
Missing one heir under § 8110 can subject the petitioner to personal liability for re-notice costs
Local rule traps in Los Angeles, Orange County, and San Francisco catch DIY filers off guard
Trust matters under § 17203 carry a 30-day notice rule that confuses petitioners used to the 15-day estate rule

County-Level Local Rule Nuances

Each county adds its own twists, and ignoring them invites rejection.

Los Angeles County

The Los Angeles Superior Court probate division publishes detailed probate notes on its website before each hearing. Petitioners should check notes the week before the hearing, because the notes often demand corrections to DE-121 such as re-noticing a missed party. The consequence of ignoring a probate note is automatic continuance.

LA County also requires e-filing for most probate petitions through File & ServeXpress or another approved provider. A common mistake is filing the proof of service in paper after e-filing the petition; the court rejects mismatched filing channels.

Orange County

Orange County Superior Court publishes a probate examiner’s calendar and tentative rulings online. The court demands strict compliance with California Rules of Court Rule 7.51 and adds a local requirement that the proof of service identify each person’s relationship to the decedent.

The consequence of a generic relationship like “interested party” is a probate note. A real example: Carlos, a petitioner in Santa Ana, listed cousins as “family members.” The probate examiner required an amended proof of service identifying each cousin’s specific relationship under § 6402.

San Diego County

San Diego Superior Court probate runs out of the Madge Bradley Building. The court enforces a strict rule that the DE-121 must list the courthouse address as 1409 Fourth Avenue, San Diego, CA 92101, even though general civil filings use a different address. Listing the wrong address causes confusion at hearings.

San Francisco County

San Francisco Superior Court probate operates under the Civic Center Courthouse. The court issues probate notes online roughly two weeks before the hearing. Petitioners must respond to notes through a supplemental filing before the hearing or face continuance.

How DE-121 Interacts With Other Probate Forms

DE-121 does not stand alone. It is part of an interlocking system of Judicial Council forms that govern California probate.

DE-111 Petition for Probate

DE-111 is the underlying petition that triggers the need for DE-121. The petition must be filed first; only after the clerk assigns a hearing date can the petitioner complete the DE-121 hearing details. The consequence of preparing DE-121 before DE-111 is a wasted form because the case number and date will be missing.

DE-115 Notice of Hearing—Trust

DE-115 is sometimes confused with DE-121, but it is a separate form for certain trust petitions outside the broader scope of DE-121. The consequence of using the wrong one is rejection at intake. A common misconception is that any trust matter uses DE-115; in fact, most § 17200 petitions use DE-121.

DE-120 Notice of Hearing—Decedent’s Estate or Trust (Spousal Property)

DE-120 handles notice for spousal property petitions filed under Probate Code § 13650. It mirrors DE-121 in structure but applies to a narrow set of cases. Using DE-121 instead of DE-120 in a spousal property matter triggers a probate note in most counties.

DE-160 Inventory and Appraisal

DE-160 is the inventory the personal representative files with the help of a Probate Referee. Inventory deadlines run alongside hearing notice deadlines, and a missed inventory can derail a final distribution hearing even if DE-121 was perfect.

Recap of Key Court Rulings

Several California decisions shape how courts read DE-121 defects.

Estate of Earley established that defective notice voids any resulting probate order, even years later, when the missed heir had no actual knowledge. The consequence is that a personal representative who closes an estate based on bad notice can face personal liability for distributions that must be unwound.

Estate of Lensch (2009) 177 Cal.App.4th 667 reinforced that the 120-hour survival rule under Probate Code § 220 interacts with notice obligations because the identity of heirs can change with survival evidence. A real example is when a couple dies in the same accident; the heirs of each spouse may shift depending on the order of death, which changes the DE-121 service list.

Babbitt v. Superior Court (2016) 246 Cal.App.4th 1135 confirmed that trust beneficiaries entitled to notice under § 17203 include contingent beneficiaries whose interest may never vest. The consequence of leaving them off DE-121 is the same as leaving off a vested heir: vacatur of any resulting order.

Step-by-Step Filing Workflow

Here is the chronological order most California petitioners follow.

File the underlying petition (DE-111, § 17200, or other) and pay the filing fee, which is typically $435 under the Statewide Civil Fee Schedule
Receive the case number and tentative hearing date from the clerk, either on paper or through the e-filing portal
Prepare DE-121 with the hearing details, the petitioner’s name, and a clear description of the petition
Attach DE-121(MA) if more than four people will be served
Hand the packet to a non-party adult, or engage a service like One Legal, to mail copies to every interested party
Have the server complete and sign the proof of service on the back of DE-121 or on the attachment
File the original signed DE-121 with the clerk before the hearing, ideally at least 10 days in advance
If newspaper publication is required, arrange it under § 8120 and file the DE-160 Proof of Publication separately
Check the court’s probate notes 5–7 days before the hearing and file any supplemental responses
Attend the hearing or appear by remote video per local rules

FAQs

Is California Form DE-121 mandatory for every probate hearing?

Yes. Almost every petition affecting a decedent’s estate or a trust under Probate Code § 17200 requires DE-121, with narrow exceptions for matters that proceed without a noticed hearing.

Can I serve DE-121 by email instead of regular mail?

No. Email service is allowed only when the recipient has consented in writing under Probate Code § 1215, otherwise first-class mail or personal service is required.

Do I have to notice heirs who are disinherited under the will?

Yes. Probate Code § 8110 requires notice to all heirs at law, including disinherited ones, because they have standing to contest the will at the hearing.

Can the petitioner sign the proof of service on DE-121?

No. Code of Civil Procedure § 1013a forbids self-service, so a non-party adult over 18 must mail the notice and sign the proof.

Is 15 days before the hearing the only deadline I need to know?

No. Trust petitions under Probate Code § 17203 require 30 days, and certain matters require even longer notice, so check each statute that governs your petition.

Do I have to publish DE-121 in a newspaper?

No. DE-121 itself is not published, but initial probate petitions require a separate newspaper notice under Probate Code § 8120 in addition to mailed DE-121.

Can I use DE-122 instead of DE-121 for an estate?

No. DE-122 is for guardianship and conservatorship matters, not decedents’ estates, and using it in a probate case will result in immediate rejection.

Is the California Attorney General notified for charitable beneficiaries?

Yes. Probate Code § 17210 and Government Code § 12591 require notice to the Attorney General’s Charitable Trusts Section when a charity has an interest.

Can I e-file DE-121 in Los Angeles County?

Yes. Los Angeles Superior Court mandates e-filing for most probate documents through approved providers like File & ServeXpress and One Legal.

Does mailing on a Saturday count for the 15-day rule?

No. Mailing dates falling on weekends or court holidays may delay computation under CCP § 12, so always mail on a regular business day to be safe.

Can I correct a defective DE-121 without re-noticing everyone?

No. Material defects, including a missed party or wrong hearing date, require re-service of an amended DE-121 with a new 15-day clock unless every interested party signs a written waiver.

Are there filing fees for DE-121 itself?

No. DE-121 is filed as part of the underlying petition, so no separate fee applies, although the petition itself usually carries the $435 statewide filing fee.

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