Judicial Council of California · United States

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Form FL-100: Petition—Marriage/Domestic Partnership (Family Law)

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Quick answer

Form FL-100, Petition—Marriage/Domestic Partnership (Family Law), is the Judicial Council of California form that starts a divorce, legal separation or annulment for married couples and registered domestic partners. The current revision is January 1, 2020, and it is filed together with a Summons (form FL-110) — plus a UCCJEA declaration (FL-105) when there are minor children — for a $435 first-paper fee on the 2026 statewide schedule, or with a fee waiver (FW-001). It records the residence requirement, the dates of marriage and separation, the children, the legal grounds and every order you are asking for: custody and parenting time, child support, spousal support, separate and community property, attorney fees and a former name. With JustFill you open the official three-page PDF in your browser, type into every field and checkbox, and the first clean completed download is included at no charge; you then file it with the court yourself.

Form
FL-100
Issued by
Judicial Council of California
Country
United States
Free allowance
First clean download
Official edition
FL-100 [Rev. January 1, 2020] — Form Adopted for Mandatory Use, Judicial Council of California, 3 pages
Source checked

What is FL-100?

Starting a California divorce? FL-100 (current revision January 1, 2020) is the first paper you file, always paired with the Summons (FL-110), and JustFill turns the official three-page Judicial Council PDF into a fillable form in your browser. Filing also starts the clock: the earliest a divorce can be final is six months and one day after the respondent is served with the Summons and Petition (or files a Response), while legal separation has no waiting period. It rests on Family Code sections 297, 299, 2320, 2330 and 3409. Item 1 states your legal relationship. Item 2 covers the residence requirement — six months in California and three months in the county. Item 3 records the statistical facts: date of marriage or registration, date of separation, and the time between them in years and months. Item 4 lists minor children. Item 5 states the legal grounds. Items 6 to 11 are your actual requests: custody, child support, spousal support, separate property, community property, attorney fees and a former name. Item 12 confirms you have read the restraining orders printed on the back of the summons.

Download the FL-100 form PDF — free

The official FL-100 PDF (revision January 1, 2020, three pages) is free from the Judicial Council of California at courts.ca.gov/documents/fl100.pdf; every county court's self-help center links the same file. There is no separate FL-100 instruction booklet — the guidance sheet is Legal Steps for a Divorce or Legal Separation (form FL-107-INFO), and the items are explained on this page. The court PDF is fillable in Acrobat; if you would rather not install anything, upload it to JustFill to complete every item and checkbox on screen, download the finished petition (the first clean completed download is included at no charge), print it and file it with the Summons (FL-110) at the superior court of the county where you meet the residence requirement.

Get the official FL-100 PDF from Judicial Council of California

Who fills out FL-100?

  • A spouse starting a divorce, legal separation or annulment in California
  • A registered domestic partner ending a partnership registered in California
  • Same-sex couples married in California who now live where the marriage will not be dissolved
  • Self-represented petitioners filing without a lawyer
  • Anyone amending an earlier petition — the form has an AMENDED checkbox

Field-by-field breakdown

What each section of FL-100 asks for. JustFill’s AI will detect these fields automatically when you upload the PDF — review the breakdown below so you know what to enter.

Item 1 — legal relationship

Whether you are married, domestic partners registered in California, or domestic partners registered elsewhere. Check all that apply — the answer changes which residence rule applies to you.

Item 2 — residence requirements

That the petitioner or respondent has lived in California at least six months and in the county at least three months immediately before filing. If your domestic partnership was registered in California, neither of you has to be a California resident to dissolve it here.

Item 3 — statistical facts

Date of marriage or of registering the partnership, date of separation, and the elapsed time stated in years and months. Two separate blocks, one for marriage and one for registration.

Item 4 — minor children

Each child’s name, birthdate and age, or a statement that there are none. A child not yet born is checked separately. If there are minor children, a completed UCCJEA declaration (form FL-105) must be attached.

Item 5 — legal grounds

Divorce or legal separation on irreconcilable differences or permanent legal incapacity to make decisions; or nullity of a void marriage (incest, bigamy) or a voidable one (age at registration, prior existing marriage, unsound mind, fraud, force, physical incapacity).

Items 6–8 — custody, child support, spousal support

Legal custody, physical custody and parenting time, each assigned to petitioner, respondent, joint or other, with the detail set out in FL-311, FL-312, FL-341(C), FL-341(D), FL-341(E) or an attachment. Then child support, and spousal or partner support: payable to, terminated, or reserved for later determination.

Items 9–11 — property and other requests

Separate property to be confirmed and community and quasi-community property to be divided, either listed on the form or on a Property Declaration (form FL-160); then attorney fees, restoration of a former name, and anything else.

Common mistakes to avoid

  • 1Filing before meeting the residence requirement. Six months in the state and three months in the county, immediately preceding the filing.
  • 2Leaving the date of separation blank or approximate. It drives what counts as community property.
  • 3Forgetting to attach the UCCJEA declaration (form FL-105) when there are minor children — item 4 says it must be attached.
  • 4Listing children on the form and nowhere else. If they do not fit, the form directs you to Attachment 4b.
  • 5Checking both irreconcilable differences and a nullity ground. Item 5 asks you to check one basis.
  • 6Skipping item 12. It confirms you have read the standard restraining orders on the back of the summons, and they bind you from the moment you file.
  • 7Leaving Social Security numbers visible. The form notes you may black them out on anything except a support-collection form.

FL-100 example — what a filled-out form looks like

A self-represented petitioner in Sacramento County files for divorce after a ten-year marriage with one minor child. Both spouses have lived in California and in the county for years. She asks for joint legal custody, guideline child support, spousal support reserved, community property divided on a Property Declaration, and her former name restored.

Petition for / Item 1 — legal relationship

Dissolution (Divorce) of: ☑ Marriage · 1a ☑ We are married.

Tick one line at the top (divorce, legal separation or nullity) and then the relationship in item 1. Items 1b and 1c are only for registered domestic partners.

Item 2 — residence requirements

2a ☑ Petitioner ☑ Respondent — resident of California for at least six months and of Sacramento County for at least three months before filing

For a divorce at least one spouse must meet it (unless the partnership was registered in California, item 1b). Checking both is fine when both qualify.

Item 3a — statistical facts

(1) Date of marriage: 06/20/2015 · (2) Date of separation: 03/01/2026 · (3) Time from marriage to separation: 10 Years 8 Months

The date of separation fixes when community property stops accruing, so give the actual date rather than an approximation. Item 3b is the equivalent block for a domestic partnership.

Item 4 — minor children

4b ☑ Sam Doe · 09/12/2018 · Age 7 · 4d: Declaration Under UCCJEA (form FL-105) attached

Item 4d requires a completed FL-105 whenever there are minor children of both parties. Give the age on the filing date; use Attachment 4b if the children do not fit.

Item 5 — legal grounds

5a ☑ Divorce · (1) ☑ irreconcilable differences

The no-fault ground almost every California divorce uses. Check one basis only; 5b and 5c are nullity grounds for void or voidable marriages.

Item 6 — child custody and parenting time

6a Legal custody: Joint · 6b Physical custody: Petitioner · 6c Parenting time to: Respondent · As requested in ☑ form FL-311

The petition only names who gets what; the actual schedule goes on FL-311 or one of the FL-341 attachments.

Items 7 and 8 — child support and spousal support

7a–7c are notices, nothing to tick · 7d Other: blank · 8c ☑ Reserve for future determination the issue of support payable to ☑ Petitioner

Child support is set later on request with financial forms (FL-150); the petition just keeps the issue open. Reserving spousal support keeps the court's power to award it; ticking 8b instead ends that right for good.

Items 9 and 10 — separate and community property

9a ☑ There are no such assets or debts that I know of to be confirmed · 10b ☑ Determine rights to community and quasi-community assets and debts, listed in ☑ Property Declaration (form FL-160)

Assets can go on the form itself, on FL-160 or on an attachment; FL-160 is the usual choice once a house, cars and retirement accounts are involved.

Item 11 — other requests

11b ☑ Petitioner's former name be restored to: JANE M ROE · 11a and 11c blank

Asking here means the judgment restores the name without a separate proceeding. 11a is where you would ask the other side to pay attorney fees.

Item 12, signature and date

12 read and acknowledged · Date 09/14/2026 · JANE M DOE typed, signed on the petitioner line; attorney line blank

Item 12 confirms you have read the standard family law restraining orders on page 2 of the Summons (FL-110); they bind both parties from filing. Self-represented petitioners leave the attorney signature empty.

These values are made up. They are here to show what belongs on each line, not to be copied — every name, number, and address on your own FL-100 has to be your own.

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Frequently asked questions

The Summons (form FL-110) — the FL-100 is never filed alone — and, if there are minor children, the Declaration Under UCCJEA (form FL-105); if you are asking for a custody or parenting-time order, the schedule goes on FL-311. The clerk collects the first-paper fee ($435 on the 2026 statewide schedule; Riverside, San Bernardino and San Francisco add a local surcharge) unless you file a fee waiver request (form FW-001).
For a divorce, at least one of you must have lived in California for six months and in the county for three months immediately before filing (item 2a). Two exceptions on the form: a domestic partnership registered in California can be dissolved here whatever your residence (item 2b), and a same-sex couple married in California who now live where the marriage will not be dissolved may file in the county where they married (item 2c). Legal separation has no residence requirement of its own, which is why some people file for separation first and amend later.
Item 3 asks for it because it marks the end of the period in which earnings and debts are generally community property.
Yes. Item 12 confirms you have read them, and the standard family law restraining orders bind both parties from filing until the judgment or a further order.
The form has an AMENDED checkbox at the top for filing an amended petition.
There is no separate "FL-100 instructions" form. The Judicial Council's guidance is Legal Steps for a Divorce or Legal Separation (form FL-107-INFO), named on page 3 of the petition, and the form itself is self-explanatory item by item: 1 relationship, 2 residence, 3 dates of marriage and separation, 4 children, 5 grounds, 6 custody and parenting time, 7 child support, 8 spousal support, 9 separate property, 10 community property, 11 other requests, 12 the restraining-orders acknowledgment. The worked example on this page shows one completed petition; the California courts' self-help site (selfhelp.courts.ca.gov) walks through the whole case.
Yes. FL-100 is the petition for every California divorce (dissolution), legal separation and annulment (nullity) of a marriage or registered domestic partnership — you pick the case type at the top of page 1. Summary dissolution for short, childless marriages uses a different joint form (FL-800), and custody or support between unmarried parents uses the parentage forms, not FL-100.
The petition is a "first paper", and the Statewide Civil Fee Schedule effective January 1, 2026 sets that fee at $435 for a dissolution, legal separation or nullity petition; Riverside, San Bernardino and San Francisco add a local surcharge. The respondent pays the same to file a Response (FL-120). If you cannot afford it, file a Request to Waive Court Fees (FW-001) with the petition. JustFill only prepares the PDF; the fee is paid to the court when you file.
Not before six months and one day from the earliest of: the date the respondent was served with the Summons (FL-110) and Petition (FL-100), the date a Response (FL-120) was filed, or the date an Appearance, Stipulations, and Waivers (FL-130) was filed. The waiting period only sets the earliest date — you are not divorced until the court enters a judgment. Legal separation has no waiting period.
Someone 18 or older who is not you serves the respondent with the filed Petition, the Summons and any attachments, and files a Proof of Service of Summons (FL-115). The respondent then has 30 calendar days to file a Response (FL-120). Within 60 days of filing you also serve your preliminary financial disclosures (FL-140, FL-142 or FL-160, FL-150). If you need custody, support or other orders in the meantime, ask for temporary orders with a Request for Order (FL-300).

Official source: FL-100 on Judicial Council of California’s website

Edition checked: FL-100 [Rev. January 1, 2020] — Form Adopted for Mandatory Use, Judicial Council of California, 3 pages. Verified against the official source on .

Form FL-100 is published by the Judicial Council of California. JustFill is not affiliated with the Judicial Council or any California court.

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