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JDF1040

Guide to Annulment (invalidity)

Colorado · Colorado Judicial Branch · Effective May 1, 2024

This guide explains the process for asking a court to cancel a marriage or civil union for a specific legal reason. It lists the forms needed and the steps involved in the annulment process.

Open the official PDFfrom Colorado Judicial Branch

Where this fits in a case

General & info

Information / general use — not tied to one step of a case

This guide is used by people who need to file for an annulment, which is a process that cancels a marriage or civil union. The guide provides information on who must live in Colorado and what forms to file.

Either party may file.

Common questions

Who needs to file this guide?
This guide is for people who are trying to invalidate their marriage or civil union through a court process.
Do I need a lawyer to file for an annulment?
You do not have to have a lawyer, but you must follow the same rules and procedures that lawyers follow.
What happens if I change my mind about the annulment?
If both parties want to stop the annulment, you must notify the court right away by filing form JDF 1305.

Revision history

No changes recorded since we started tracking this form on October 10, 2026. The current version took effect May 1, 2024.

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