N-400
Application for Naturalization
Naturalization under INA 316, 319, 328, 329 and other provisions.
Current forms guide · verified August 29, 2026
Citizenship and naturalization forms
The form number is only the beginning. Edition dates, filing method, fee category and evidence instructions can change. CitizenApproved links to the live USCIS form page rather than preserving downloadable copies that can quietly become obsolete.
USCIS form page
N-336
Request for a Hearing on a Decision in Naturalization Proceedings
Administrative review of a denied Form N-400 under INA 336.
N-470
Application to Preserve Residence for Naturalization Purposes
For certain permanent residents employed abroad who seek to preserve continuous residence for naturalization.
N-565
Application for Replacement Naturalization/Citizenship Document
Replace or correct certain naturalization/citizenship documents or request a special certificate.
N-600
Application for Certificate of Citizenship
Evidence of citizenship acquired or derived through a parent; the certificate documents citizenship rather than creating it.
N-600K
Application for Citizenship and Issuance of Certificate Under Section 322
Application-based citizenship process for qualifying children who regularly reside outside the United States.
N-426
Request for Certification of Military or Naval Service
Military-service certification used in qualifying military naturalization cases.
N-644
Application for Posthumous Citizenship
Request for posthumous citizenship under the military-service statute.
N-648
Medical Certification for Disability Exceptions
Medical certification supporting a statutory exception to English and/or civics testing.
Before you file
- Open the current USCIS form page and confirm the accepted edition date.
- Read the current form instructions, not a saved copy from an earlier filing.
- Use Form G-1055 for the current fee and exemption category.
- Confirm whether online filing is available or required for your filing category.
- Keep a complete copy of what you submit and every USCIS notice.
Fee waivers are form-specific
Form I-912 is USCIS's request for a fee waiver, but not every form or filing category is eligible. The current G-1055 fee schedule identifies which forms accept a waiver and which statutory $0 categories apply.
Form I-912