Colorado Name Change Petition for a Minor (JDF 421)
Colorado Judicial BranchLegal name changeForm JDF 421Free downloadLast verified November 10, 2026
Petition that one or more adults use to ask a Colorado court to change the legal name of a minor child. It is filed with the County Court or District Court, as explained in the JDF 420 guide, not with the vital records office.
Who can use this form
- The adult or adults asking for the name change of a minor child.
- Each petitioner signs under penalty of perjury. A second parent can sign as co-petitioner.
- A child who is 14 or older must not have been adjudicated a juvenile delinquent for an offense that would be a felony for an adult.
What to send with it
- The completed and signed petition, with the reason for the name change.
- If the child is 14 or older: the child’s fingerprint-based criminal history record check, labeled Attachment 1.
- The death certificate of the non-custodial parent, if any.
- JDF 423 Consent of the non-custodial parent, which can be filed at the same time, or JDF 422 Notice.
Where to send it
- Mail to
- See the form for where to file it.
- State fee
- Filing fee: $98 in County Court, $268 in District or Juvenile Court (stated in JDF 420, not on this form).
- Typical processing
- Not provided
- Issued by
- Colorado Judicial Branch
- Form revision
- R: October 12, 2026
- Source
- Official government page