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NC-312Mandatory

Marriage License and Certificate—Attachment

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

This form is an attachment used when asking the court to issue new marriage licenses and certificates. It asks for details about the original marriage documents and information about the spouse who shares those documents.

The court describes it as: Gives the court information about your current marriage license and certificate and the spouse sharing them. Use this if you are seeking a new marriage certificate reflecting your change of gender along with any change of name. This is attached to a NC-300 form before it is filed.

Open the official PDFfrom Judicial Council of California

Where this fits in a case

Motions

Stage: Motions

This form is used when a person is filing a request to the court to get new marriage certificates that reflect a change in gender, a change in name, or both. It must be attached to form NC-300 before filing.

Usually filed by the person starting the case.

Official instructions

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

Common questions

What is this form for?
This form is an attachment that gives the court details about your current marriage license and certificate when you are asking for new ones. It is used when seeking a new certificate that reflects a change in gender or name.
Who needs to fill this out?
The petitioner must complete and attach this form to form NC-300 if they are asking the court for new certificates.
Does the spouse need to sign this?
The request must be signed by the spouse who shares the original license and certificate, unless that spouse is deceased or unable to sign.

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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