N-600 Certificate of Citizenship — Acquisition vs. Derivation
N-600 covers two distinct pathways: acquisition (was a U.S.
Published
2026-01-01
Summary
N-600 covers two distinct pathways: acquisition (was a U.S. citizen automatically at birth abroad through a citizen parent — no age limit to request proof) and derivation (became a citizen automatically as a minor under the Child Citizenship Act of 2000, generally requiring the child to have been under 18, an LPR, and in the legal and physical custody of a U.S.-citizen parent at the time that parent naturalized).
Current status
N-600 doesn't confer citizenship — someone who qualifies is already a citizen by operation of law; the form only requests the government's proof document. It is not the right form for an LPR intending to naturalize (that's N-400), someone born in the U.S. (a birth certificate suffices), or someone already naturalized as an adult (a Certificate of Naturalization, not N-600). Processing time varies widely by service center.
Source: USCIS: N-600, Application for Certificate of Citizenship
General policy background, not a diagnosis of any specific case — CaseWhy's own case status API never confirms why a case is delayed. For guidance specific to your case, talk to a licensed immigration attorney.