Documents Needed for U.S. Citizenship (N-400) in 2026

📋 Informational · Not legal advice

This article is an educational resource based on public USCIS information about documents required for N-400. MBO Immigration LLC is a document preparation service — we are not attorneys and do not provide legal advice. For naturalization eligibility analysis (especially with criminal records, tax issues, or complex situations), consult a licensed immigration attorney.

The U.S. citizenship application is filed using Form N-400. Per USCIS, individuals with green cards for at least 5 years (or 3 years if married to a U.S. citizen), among other requirements, may be eligible for naturalization.

This article compiles the list of documents USCIS typically requires per public information — organized by category — as a reference for people gathering their documentation packet.

Basic documents (all applicants)

1. Original green card

Bring the physical card to your interview. If lost, replacement (I-90) is required first — N-400 cannot be filed without a current green card.

2. Passport from country of origin

All pages, including blank pages. This allows USCIS to verify travel during the residence period.

3. State ID

Driver’s license or state-issued ID.

4. Birth certificate

Original or certified copy from country of origin. If not in English, certified translation is required.

5. Social Security card

Original. If lost, request replacement at SSA.gov before applying.

Documents about residence and travel

6. Detailed list of trips outside the U.S. in last 5 years

Required:

• Exact departure and return dates
• Country visited
• Reason for trip

USCIS has this information from your passport, but they want to see your list for verification. Discrepancies can cause issues.

7. Proof of U.S. residence (last 5 years)

• Leases or property titles
• Utility bills (water, electric, gas)
• Bank statements
• Official letters (DMV, bank, etc.)

USCIS verifies continuous residence. Any absence over 6 months can break “continuous residence.”

Tax documents

8. Federal tax returns (last 5 years)

Originals or signed copies of IRS Form 1040 from last 5 years.

Important: per USCIS, you must have filed taxes. If a year wasn’t filed, USCIS sees it as a serious issue. If unsure, consult a CPA first.

9. IRS no-debt letter (if applicable)

If you have IRS debt, USCIS may require an active payment plan. A letter from the IRS confirming an approved payment plan suffices.

Good moral character documents

10. Documents for any arrest or detention (if applicable)

USCIS asks about any arrest, including dismissals, juvenile cases, and even non-conviction arrests. Bring:

• Court documents (case disposition)
• Any judicial orders
• Probation/parole letters

A minor traffic infraction (without arrest) doesn’t count. But a DUI, any arrest, or any crime does.

11. Child support proof (if applicable)

If divorced and owe child support, USCIS verifies you’re current on payments. Letters from the Department of Child Services or courts confirming.

12. Selective Service registration proof (if applicable)

If male and lived in the U.S. between ages 18–25, you should have registered for Selective Service. Prove with letter from SSS.gov.

Documents for special cases

If married to a U.S. citizen (3-year rule):

✅ Marriage certificate ✅ Spouse’s naturalization certificate or U.S. passport ✅ Bona fide marriage evidence (same as for green card):

• Joint bank statements
• Leases with both names
• Insurance policies
• Photos of significant events ✅ Joint tax returns (last 3 years)

If you have children:

✅ Children’s birth certificates ✅ Adoption decrees (if adopted) ✅ Child support proof (if applicable)

If you’ve been divorced (any time):

✅ Final divorce decree ✅ Prior marriage certificate ✅ If married to a U.S. citizen and later divorced: proof of when marriage ended

Waiver documents

If applying for English/civics test waivers by age/time or medical disability, you need:

Age/time waiver (50/20 or 55/15)

• 50+ years old AND 20+ years as resident: civics test in your language, no English required
• 55+ years AND 15+ years as resident: same

No extra documents needed — USCIS verifies via records.

Medical waiver (N-648)

For medical conditions preventing English learning or civics test:

• Form N-648 signed by a doctor
• Supporting medical documentation

Civics and English test

For most applicants, in the interview you must:

1. Reading test: read an English sentence
2. Writing test: write an English sentence
3. Civics test: officer asks 10 questions from list of 100. Must answer 6 correctly.

USCIS publishes the 100 questions and answers on their site. Study all 100 before the interview.

USCIS fees (2026)

• N-400 application fee: $760 (online) or $710 (paper)
• Biometrics: included in fee
• USCIS total: $760

(Reduced fee available if eligible — Form I-942)

Items applicants frequently forget

Based on experience preparing these packets, these are most-forgotten items:

• Original green card — USCIS requires it at interview. Applicants who forget typically must reschedule.
• Certified translations of any non-English documents — USCIS doesn’t accept untranslated documents.
• Studying the 100 civics questions — USCIS publishes them. Prepared applicants have better outcomes.
• Consistency with prior statements — USCIS verifies N-400 answers against I-485 and other prior forms. Inconsistencies are detected.

After approval

1. You receive notice for your Oath Ceremony
2. At the ceremony, you swear allegiance to the U.S.
3. You receive your Certificate of Naturalization
4. Immediately after you can:
   • Apply for U.S. passport
   • Register to vote
   • Sponsor family members for green cards

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Need help with your N-400?

At MBO Immigration LLC we prepare N-400 packets — fill out the form, organize documents, and verify information consistency against published USCIS requirements. We also share bilingual civics test study materials.

We are not attorneys, do not provide legal advice, and do not represent clients in interviews.

If your case involves criminal records, tax issues, long absences from the U.S., or other complications, a licensed immigration attorney is appropriate to evaluate eligibility before applying.

If your case is standard and you need documentation prepared well:

Get your free quote →

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Legal notice: MBO Immigration LLC is a document preparation service. We are not attorneys and do not provide legal advice. This post is informational and does not substitute consultation with a licensed attorney for your specific situation.