Form N-400 Information and Document Checklist

Date of Information: 09/23/2026

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Applying for naturalization takes more than filling in a name and an address. Form N-400 asks about your immigration history, travel, family, work, taxes, and conduct. This checklist will help you gather the information we need to prepare and review your application. Your circumstances determine which records USCIS requires; you may not need every item below.

Charles International Law uses an N-400 questionnaire and, when relevant, shorter follow-up questionnaires for specific histories or events. We will tell you which ones to complete. A questionnaire helps us prepare your case; it is not Form N-400 and does not submit an application to USCIS.

First, confirm the correct citizenship path

Have your permanent resident card available and tell us when and how you became a lawful permanent resident. Tell us if either parent is or was a U.S. citizen, including when the parent became a citizen and whether you lived with that parent as a child. Some people already acquired citizenship through a parent and need proof of citizenship rather than naturalization. Marriage to a U.S. citizen or qualifying military service can also affect the applicable path and timing.

Information to Gather Generally

Identity and immigration: Your current legal name and all prior names; birth information; nationality; A-Number; permanent resident date; USCIS online account number and Social Security number, if any; and relevant prior immigration filings, notices, or proceedings.
Addresses: Current physical and mailing addresses, prior residences, and complete dates. Include periods living outside the United States and tell us about any gaps.
Work and education: Employers, self-employment, periods without work, and schools during the period requested by the current N-400. Gather names, locations, roles, and dates.
Travel: Trips outside the United States during the applicable period, with departure and return dates. Have old passports and travel records available if dates are uncertain, and identify lengthy or frequent absences.
Family: Your current spouse; prior marriages for you and your spouse; dates and places of marriage and termination; and information about your children, as requested by the current form.
Taxes and support: Tax filing history, unfiled returns or payment arrangements, and relevant child-support or alimony obligations and payment records.
Civic and other history: Selective Service, military service, registration or voting, claimed U.S. citizenship, organizational affiliations, and the other eligibility questions on Form N-400.
Incidents requiring explanation: Arrests, citations, detentions, charges, convictions, diversion, probation, parole, incarceration, immigration violations, or other matters raised by the form, wherever they occurred and regardless of how they ended.

Tell us about an incident even if the charge was dismissed, the record was sealed or expunged, or the matter seems minor. We will determine what the current application requires you to disclose and which records to obtain. If you are unsure about an answer or date, tell us instead of guessing.

Complete the applicable questionnaires

Start with the N-400 (Naturalization) Questionnaire. The forms below provide more detail when a topic applies to you. Follow each form’s instructions about submitting a separate response for each person, marriage, or incident. The more information you provide at this stage, the smoother your N-400 completion will be.

Residence, work, education, and travel

Residential History Questionnaire: Provide addresses and dates so we can reconstruct your residential history.
Employment History Questionnaire: Provide your work history, beginning with your current or most recent position.
Foreign Travel Questionnaire: List trips outside the United States lasting 24 hours or longer during the last five years, as the questionnaire directs.
Educational History Questionnaire: Complete this if we request a fuller school or training history for your case.

Family and citizenship through a parent

Marriage Questionnaire: Provide information about your current marriage and spouse.
Prior Marriage Questionnaire: Complete one response for each of your prior marriages when applicable.
Current Spouse’s Prior Marriage Questionnaire: Use this when we need details about a prior marriage of your current spouse.
Child Questionnaire: Complete one response for each child when applicable.
Parent Questionnaire: Complete one response for each parent when requested, particularly if a parent’s citizenship may affect your own.
N-600 Questionnaire: This concerns a certificate of citizenship. We may direct you to it if you appear to have acquired citizenship through a parent; it is not a routine supplement to every N-400.

Identifying information and affiliations

Physical Description Questionnaire: Provide identifying characteristics used on immigration forms. Tell us if an answer does not accurately describe you or conflicts with your documents.
Group Affiliation Questionnaire: Provide more information when a membership or activity needs explanation.

Arrests, charges, and case outcomes

These forms address different parts of a criminal matter. One incident may require more than one questionnaire, and we may ask for a separate response for each event.

Representation and other people included in a matter

Attorney Entry of Appearance Questionnaire: Provide the information we need to prepare Form G-28 if we represent you before USCIS. If you have already filed an application, have its receipt number available.
Beneficiary Questionnaire (Individual Visa, Asylum, or Naturalization): This gathers information about another person included in an individual immigration matter. We will tell you if it applies to your case.

The questionnaires gather information for our review. You will also need to provide the documents appropriate to your circumstances.

Documents to have available

Usually useful at the start

Both sides of your permanent resident card, along with any notices or records explaining a replacement card or discrepancy.
Current and expired passports and travel documents covering the relevant period, plus records that help verify trip dates.
Documents showing legal name changes, such as marriage certificates or court orders, if applicable.
Copies of relevant prior immigration applications, notices, and decisions that you have available.

When your circumstances call for them

Marriage or family history: Marriage certificates; divorce decrees, annulments, or death certificates ending earlier marriages; proof of a spouse’s U.S. citizenship; and other evidence requested by the current N-400 instructions.
Travel or residence questions: Passports, entry and exit records, leases, employment or school records, tax transcripts, and other records that help explain an extended absence or a period of residence.
Taxes or dependents: Tax-return transcripts, proof of filing or payment arrangements, and relevant support orders and payment records.
Police or court matters: Available arrest or court records, charging documents, final dispositions, sentencing and completion records, and records concerning diversion, probation, or expungement. Tell us if an agency says a record cannot be obtained.
Military service or Selective Service: Relevant service, discharge, registration, or status records.
A requested disability-based testing exception: Speak with us about Form N-648 and the required medical certification before submitting medical information.
Other circumstances: Records needed for a special filing basis, an exception, or an issue we identify during review.

Keep copies of what you provide, and do not send original identity or civil documents unless we ask for them. Documents in a foreign language submitted to USCIS generally require a complete English translation with the translator’s certification; check the current form instructions for the particular filing.

What happens after you provide the information

We will review your questionnaires and documents, identify missing dates or records, assess issues that may affect eligibility, and prepare the N-400 and supporting materials for your review. Before filing, check every answer against your records and tell us about any correction or change. USCIS may later request additional evidence, take biometrics, and ask about your application at an interview.

Keep us informed about new travel, arrests, address changes, or other significant events after filing. If you are ready to discuss your case, contact Charles International Law, and we can help determine which questionnaires apply to you.

Official References

Frequently Asked Questions About the Form N-400 Checklist

1. Does completing your N-400 questionnaire file my application for naturalization?

No. Our N-400 questionnaire gathers information so we can evaluate your case and prepare your application. Form N-400 is filed with USCIS only after the application has been prepared and reviewed.

2. Do I need to complete every questionnaire linked on this page?

No. Start with the N-400 questionnaire, then complete the supplemental forms that apply to your history or that we ask you to complete. For example, someone who has never been married does not need the marriage questionnaires, while one criminal incident may call for several forms describing different stages of the case.

3. How far back should I list my addresses, jobs, and trips?

Follow the period requested by the questionnaire and the current Form N-400 instructions. Our foreign travel questionnaire asks for trips outside the United States lasting 24 hours or longer during the last five years; tell us about an older or unusually long absence as well if you think it may affect your eligibility. USCIS explains how travel can affect continuous residence and physical presence.

4. What if I cannot remember an exact date?

Provide the best information you can and tell us which date is uncertain. Passports, travel records, leases, tax transcripts, and employment records may help us reconstruct the timeline before we prepare the application. Do not present an estimate as an exact date.

5. Do I need to tell you about an arrest or charge that was dismissed or expunged?

Yes. Tell us about arrests, citations, detentions, charges, and outcomes even if a case was dismissed, a record was sealed or expunged, or you believe the event was minor. We will review the facts and the current N-400 instructions to determine what must be disclosed and which records USCIS requires.

6. Do I need documents as well as completed questionnaires?

Usually, yes. The questionnaires supply your account of events, while documents help verify dates, identity, immigration status, marriages, travel, and any court matters. The documents needed for filing depend on your circumstances and the current USCIS instructions.

7. What if a court or agency says it cannot provide a record?

Tell us which record you requested, the agency you contacted, and what response you received. Keep any written statement showing that the record is unavailable; we can assess what alternative evidence or explanation may be appropriate.

8. What if one of my parents is a U.S. citizen?

Tell us when your parent became a citizen and where you lived as a child. Depending on the facts, you may already have acquired U.S. citizenship and need evidence of that citizenship rather than naturalization through Form N-400. Our Parent Questionnaire helps us begin that review; Form N-600 is one possible means of seeking a certificate of citizenship.

9. Does marriage to a U.S. citizen change when I can apply?

It may. Some lawful permanent residents married to U.S. citizens can qualify under a three-year naturalization provision, but marriage alone does not establish eligibility. We will review the marriage, your spouse’s citizenship, your residence, and the other applicable requirements before recommending a filing date. USCIS provides an overview of this route.

10. Can I apply if my permanent resident card has expired?

An expired card does not, by itself, mean that lawful permanent resident status has ended. Bring the card and any renewal or replacement notices so we can review your proof of status and practical identification needs. Your eligibility for naturalization depends on the applicable requirements, not simply the expiration date printed on the card.

11. What if I need an exception from the English or civics testing requirements?

Tell us before filing so we can determine whether an age-and-residence exception or a disability-based exception may apply. A disability-based request generally involves Form N-648, completed by an authorized medical professional; we can discuss the applicable requirements and timing with you.

12. What happens after I provide my information and documents?

We review the questionnaires and records, identify gaps or issues requiring explanation, and prepare the application and supporting materials for your review. After filing, USCIS may schedule biometrics and an interview, request additional evidence, and administer the applicable naturalization tests. Keep us informed of address changes, new travel, arrests, or other significant developments while the case is pending.