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Form N-600 — Application for Certificate of Citizenship
Form N-600 is used to apply for a Certificate of Citizenship — proof of US citizenship for someone who acquired it automatically, usually through a US citizen parent, rather than through naturalization. It's different from Form N-400, which is for permanent residents applying to naturalize. Fill it out directly in your browser and download the completed PDF. FileKit is not affiliated with the IRS, USCIS, or any government agency. This is the official current form, provided for your convenience — always verify you're using the latest version at the source link below before submitting.
How to fill out N-600
- 1Select the basis for your citizenship claim (through parents, at birth, etc.).
- 2Enter your personal information and details about your US citizen parent(s).
- 3Download the completed PDF, sign it, and file it with USCIS along with evidence of your parent's citizenship and your relationship, plus the filing fee.
Frequently asked questions
What's the difference between Form N-600 and Form N-400?
N-600 is for people who are already US citizens (typically through a parent) and want documentation of that fact; N-400 is for permanent residents applying to become citizens through naturalization.
Do I need this if I already have a US passport?
A US passport can also serve as proof of citizenship — a Certificate of Citizenship is a separate document some people obtain for additional or alternative proof.
Can a parent file this on behalf of a child?
Yes — a US citizen parent or legal guardian can file Form N-600 on behalf of a minor child who qualifies.
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