Checklist · Naturalization

N-400 Document Kit: What to Gather for Naturalization

The interview goes smoothly when the file is complete and the dates match. Everything to gather, organized so you assemble it once.

By Lincoln Square Law · 7-minute read

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Use this kit to assemble everything for the N-400 application and the naturalization interview in one pass. Gather copies to submit with the application where the instructions require them, and keep the originals together to bring to the interview. The checklist is organized by the questions the officer will ask, so that each document has a clear purpose.

Identity and status

• Permanent resident card, front and back, and the original for the interview.
• Government-issued photo identification.
• Every passport used during the statutory period, including expired ones.
• Prior immigration approval notices and applications, including any denials.

Travel, residence, and physical presence

• A complete travel history with exact departure and return dates.
• Proof of each address: leases, mortgage statements, or utility bills.
• Employment history for the period: employers, addresses, and dates.
• For absences over six months: evidence of continuing U.S. ties.

Good moral character

• IRS tax transcripts for the period, and any payment plan if taxes are owed.
• Selective Service registration confirmation (men in the U.S. at ages 18 to 26).
• Proof that child support payments are current, if applicable.
• Certified disposition of every arrest, citation, or charge, even if expunged.
• Positive evidence: employer letters, volunteer work, community involvement.

Marriage-based (three-year) applicants

• Proof the spouse has been a U.S. citizen for the full three years.
• Marriage certificate and proof that every prior marriage of either spouse ended.
• Proof of living together for the three years: finances and a shared home.

Special situations

• Form N-648 from a medical professional, if requesting a disability exception.
• Income documents if requesting a reduced fee or fee waiver.
• Military service records, if applying on that basis.
• Birth certificates of minor children who may derive citizenship with you.

When to file

USCIS accepts an N-400 up to 90 days before the applicant completes the required period of permanent residence (8 C.F.R. 334.2(b)), and the applicant must have lived for at least three months in the state or USCIS district where the application is filed. Filing a day too early is a common and avoidable reason for denial, so count from the “resident since” date on the green card and use the early filing calculator USCIS publishes. Applicants who have recently moved, or who plan a long trip, should consider timing the application so the three-month residence rule is met and no long absence falls between filing and the oath.

Organizing the kit

Keep two sets: the copies submitted with the application, and a complete interview folder with originals. Arrange the interview folder in the same order as the checklist, with tabs for each category, and put the travel history, tax transcripts, and court dispositions at the front, because those are the documents officers most often ask to see. Include a one-page summary of addresses, employers, and trips that matches the application exactly. A clean, well-ordered folder lets the officer confirm each answer quickly, which keeps the interview focused and short.

After you file

USCIS will schedule a biometrics appointment for fingerprints and photographs, and later the interview. Keep your address current with USCIS, because notices sent to an old address can be missed, and permanent residents must report a change of address within 10 days. Avoid long trips while the application is pending, since continuous residence must continue through the oath. Keep adding any new document to the kit, such as a new tax return or a court record, so the file is current on the interview date.

Why each category matters

Each category answers one of the eligibility requirements. Status documents show that permanent residence was lawfully obtained and has been held for the required period (INA 316(a) and 319(a)). Travel and residence records support continuous residence and physical presence, including the rule that an absence of more than six months creates a presumption that continuous residence was broken and an absence of one year or more breaks it (8 C.F.R. 316.5(c)). Tax, support, Selective Service, and court records address good moral character (8 C.F.R. 316.10). For three-year applicants, marriage records show both the spouse’s citizenship and the marital union throughout the period (INA 319(a)).

Building the travel history

The travel history is the most time-consuming part of the kit and the most common source of mistakes. Start with every passport used during the statutory period, including expired ones, and list each departure and return date. Fill gaps with airline confirmations, employer travel records, and credit card statements. Applicants who cannot reconstruct dates may request their official arrival and departure records from government sources before filing. The totals matter: at least 30 months of physical presence for five-year applicants and 18 months for three-year applicants, and no single absence that breaks continuous residence without a plan to address it.

Court records: get them before you file

For every arrest, citation, charge, or detention, anywhere and at any time, obtain a certified copy of the final disposition from the court, even if the case was dismissed, sealed, or expunged. If records no longer exist, obtain a letter from the court or agency confirming that no record is available. Minor traffic citations generally need disclosure too when the N-400 asks about them, and those involving alcohol, drugs, or a license suspension deserve particular attention. Have counsel review the records before filing, because some offenses bar naturalization and some can also make a permanent resident removable.

Taxes and financial responsibility

Order IRS tax transcripts for each year in the statutory period. An applicant who owes taxes should bring the installment agreement and proof of payments. An applicant who did not file in a year when filing was required should address it before filing the N-400. Applicants who filed as nonresidents while living in the United States should talk with counsel, because that filing can be read as abandoning residence.

Selective Service

Men who lived in the United States in any status other than a lawful nonimmigrant status between the ages of 18 and 26 were generally required to register. Bring the registration confirmation. A man who did not register should obtain a status information letter and be prepared to explain that the failure was not knowing and willful, particularly if he is still within the statutory period after turning 26.

The 2025 civics test

For applications filed on or after October 20, 2025, the civics test uses a bank of 128 questions. Up to 20 are asked, and 12 correct answers are needed to pass. Study materials, including the official questions and answers and the reading and writing vocabulary, are published by USCIS. Applicants who qualify for an exemption or accommodation should include Form N-648 or the information supporting an age-based exemption.

Fees

Fees change, and USCIS issued a new fee schedule edition in September 2026. Check Form G-1055 and the N-400 page on the day of filing. A reduced fee or fee waiver may be available based on household income, and requires supporting documentation.

At the interview

Bring the originals of every document in this kit, the interview notice, and any documents the notice lists. Bring evidence of any change since filing: a new address, job, trip, marriage, divorce, or child. Review the N-400 as filed, and be prepared to correct any error at the start of the interview. If the officer asks for a document you do not have, ask for a written request with a deadline rather than guessing about its contents, and respond completely and on time. Keep copies of everything you hand to the officer.