Average time
About 15 to 25 minutes, but many fields may not apply to every user.
A realistic fill-session estimate, not the time you would spend hunting for the form.
Colorado statewide
Turn the official PDF into a clear, step-by-step preparation session.
Use this form to ask a Colorado court to legally change a minor child's name, giving the court the child's current and proposed name and the reason for the change.
Your legal name and, if applicable, spouse information.
Your property address and mailing address.
Year or date of birth.
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Average time
A realistic fill-session estimate, not the time you would spend hunting for the form.
Difficulty
Based on the kind of filing, the fields involved, and how much supporting info people usually need.
Best for
A plain-English read on why someone usually lands on this form.
What you will complete
Docgle breaks the form into predictable chapters before you open the full PDF.
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Strategic Brief
The Goal
JDF 421 moves a real Colorado, USA decision forward by matching names, dates, signatures, and proof to the agency record. Docgle pulls the task into plain language so you can gather the right details before exporting the final PDF.
The Warning
Check names, dates, signatures, and supporting documents before submitting the form.
Your legal name and, if applicable, spouse information.
Your property address and mailing address.
Year or date of birth.
Source confidence
Source-read lock is disabled in this environment, so the guided interview is open. This is an operator override and does not assert source-to-completion certification.
Walkthrough status
Guided walkthrough ready
Agency
Colorado Judicial Branch
Form identifier
JDF 421
Estimated time
About 15 to 25 minutes, but many fields may not apply to every user.
Verified
Jun 2026
Jurisdiction
Colorado statewide
Reference PDF
Plain-English guide
What detail is this part of the form asking for?
Docgle keeps each question tied to the official source so the next answer feels obvious.
Official form reference
The highlighted area shows where the answer belongs on the official form.