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NC-300-INFOOptional

Instructions for Filing Petition for Recognition of Adult's Change of Gender and Sex Identifier, Name Change, and Issuance of New Certificates

California · Judicial Council of California · Effective July 1, 2026

This form provides instructions for filing a petition to officially recognize a change in gender and sex identifier, and optionally to change a name and get new official certificates. It explains what documents are needed and where to file the request.

The court describes it as: Explains what will happen in your case to recognize your gender (and, if you want, to change your name) and what forms to use. Also gives information about how to fill out the forms, whether you will need to see a judge, and other important information.

Open the official PDFfrom Judicial Council of California

Where this fits in a case

Start a case

Stage: Start a case

This form is used by an adult who needs to file paperwork with the court to legally recognize a change in gender and sex identifier, and possibly change their name and get new birth or marriage certificates.

Either party may file.

Official instructions

How-to guides published by the court for this form.

Common questions

Do I need to file this petition to get a new birth certificate?
No, you do not need to file this petition or get a court order to get a new California birth certificate showing a gender change. You can ask the State Registrar directly.
Who can use this form?
This form can only be used by individuals who are 18 years old or older. Minors must use a different form (NC-500).
Is there a fee?
A filing fee will be charged unless you qualify for a fee waiver. You can find information on applying for a fee waiver using form FW-001.

Revision history

No changes recorded since we started tracking this form on October 9, 2026. The current version took effect July 1, 2026.

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