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Learn naturalized vs derived citizenship, how each status is acquired, and whether Form N-400 or N-600 may apply to you.
Compare a Certificate of Citizenship and Certificate of Naturalization, who receives each, and which document fits your citizenship path.
A Certificate of Naturalization is USCIS proof that a person became a U.S. citizen through naturalization.
Certificate of Citizenship guide covering eligibility, uses, how to get one, certificate number, and replacement process
Review Form N-600 required documents for birth, parent citizenship, custody, adoption, translations, and other evidence.
Form N-600 eligibility guide: who can file, citizenship paths, age rules, custody, adoption, and residence abroad.
Form I-90 fees 2026: USCIS cost $415 online or $465 by mail. See biometrics and waiver info.
View the 2026 Form N-600 filing fee, online and paper costs, exemptions, waiver options, payment methods, and other costs.
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