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JDF 1131

Motion to Intervene

Colorado · Colorado Judicial Branch · Effective February 1, 2024

This form is used to ask the court for permission to join an existing case. It asks the person filing the form to state why they want to become involved in the case.

Open the official PDFfrom Colorado Judicial Branch

Where this fits in a case

Motions

Stage: Motions

This form is used when someone wants to become a party in a case that is already moving forward. If other parties disagree with this request, they must submit a written response using form JDF 1315 within 21 days of the service date.

Either party may file.

Common questions

Who fills out this form?
The person or people who want to join the case fill out this form. These people are called intervenors. Great-grandparents or grandparents can check if they are the child's relative. Great-grandparents or grandparents can check if they are the child's relative.
What happens if someone disagrees with this request?
If the current parties do not agree with the request to intervene, they must submit a written response using form JDF 1315 within 21 days of the service date.
Does this form require a lawyer?
The form has spaces for a lawyer's signature, but the intervenors must also sign it.

Revision history

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

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