WHAT'S IN THIS GUIDE
- Core Documents — Required for Every Applicant
- If You Are Applying Under the 3-Year Marriage Rule
- If You Have Any Criminal History
- If You Have Military Service
- If You Have Prior Marriages
- If You Changed Your Name
- What to Bring to Your Interview
- 7 Document Mistakes That Delay Applications
- Frequently Asked Questions
CORE DOCUMENTS — REQUIRED FOR EVERY APPLICANT
These 7 documents are required for every N-400 applicant regardless of your situation. Gather all of these before you file.
Clear photocopy of the front AND back of your green card. Both sides are required — submitting only the front will trigger an RFE.
Send a photocopy only. Never mail your original green card. Bring the original to your interview.
Photocopies of ALL pages of your current passport and any passports that were valid during the past 5 years — including the cover, photo page, and every page with a stamp.
If your home country doesn't issue passports or you lost your passport, provide a written explanation and any available travel documentation. Contact your country's consulate for a replacement before filing if possible.
Either your actual IRS Form 1040 returns for each year, or IRS tax transcripts (free from IRS.gov or by calling 1-800-908-9946). Transcripts are often easier to obtain and more official.
If you were required to file and didn't, file all missing returns before submitting your N-400. USCIS will find this. Non-filing is a negative moral character factor that can result in denial.
If you're applying based on 3 years of marriage to a U.S. citizen, you only need tax returns for the past 3 years.
A written list of every trip outside the U.S. in the past 5 years. For each trip include: destination country, exact departure date (day/month/year), exact return date, and total number of days outside the U.S.
Check your passport stamps. If stamps are unclear, check bank statements, airline confirmations, or hotel receipts. For trips to countries that don't stamp passports (like many in Europe), use airline records.
No single trip should exceed 6 months. Total time outside the U.S. across all trips must be less than 30 months over 5 years. USCIS will compare your written list against your passport stamps at the interview.
A photocopy of your birth certificate from your country of birth. If it is not in English, you must include a certified English translation.
The translator must provide a written certification stating their competence to translate and that the translation is accurate. USCIS does NOT accept machine translations (Google Translate, DeepL, etc.).
Some countries (particularly older records) don't have birth certificates. USCIS accepts secondary evidence: baptismal records, school records, census records, or sworn affidavits from family members with an explanation letter.
2x2 inch photos with plain white background. Taken within the past 30 days. Front-facing, eyes open, neutral expression. Available at any USPS post office, CVS, Walgreens, or FedEx/UPS store ($10–15).
Lightly write your full name and A-Number (Alien Registration Number) in pencil on the back of each photo. Do not use pen — it bleeds through. The A-Number is on your green card.
Answer every single question. If a question doesn't apply, write "N/A" — never leave it blank. Blank fields are treated as incomplete and trigger RFEs. The form is 20 pages — take your time on every question.
The N-400 requires your signature in multiple places. An unsigned form is immediately rejected. If someone helps you complete the form (preparer), they must also sign Part 14.
Filing online at my.uscis.gov is faster and reduces errors. The system flags missing required fields before you submit.
GET YOUR PERSONALIZED DOCUMENT CHECKLIST
LEGALIAI's AI generates a document checklist specific to your situation — your country of birth, travel history, marital status, and background. Know exactly what you need before you file.
START NOW — $49IF YOU ARE APPLYING UNDER THE 3-YEAR MARRIAGE RULE
If you have been married to a U.S. citizen for at least 3 years and have been a permanent resident for at least 3 years, you may apply after only 3 years instead of 5. Additional documents required:
A photocopy of your official marriage certificate issued by the civil authority where you were married. If it is not in English, include a certified English translation.
U.S. passport copy / Certificate of Naturalization copy / Certificate of Citizenship copy / U.S. birth certificate copy if born in the U.S.
Joint bank account statements / Joint lease or mortgage / Joint tax returns filed together / Joint utility bills / Photos together / Joint insurance policies / Birth certificates of children born to the marriage.
IF YOU HAVE ANY CRIMINAL HISTORY
If you have ever been arrested, cited, charged, or convicted — even if charges were dismissed, expunged, or you were found not guilty — you must disclose it and bring documentation.
For each arrest, citation, or charge: (1) Police report, (2) Court disposition document showing the outcome, (3) Any probation or parole records. Request court-certified copies directly from the courthouse — not printed online, not from a background check service.
Never assume your criminal record was expunged without verifying. USCIS can see records that have been expunged. Non-disclosure of criminal history is far more damaging than the offense itself.
IF YOU HAVE MILITARY SERVICE
Request your DD-214 from the National Archives at archives.gov/veterans/military-service-records. Active duty service members may qualify for expedited naturalization — contact your unit's legal office.
IF YOU HAVE PRIOR MARRIAGES
A photocopy of the final divorce decree for each ended marriage. If a prior spouse died, include their death certificate. If documents are in a foreign language, include certified English translations.
IF YOU CHANGED YOUR NAME
Court order for legal name change / Marriage certificate (if name changed upon marriage) / Divorce decree (if name reverted after divorce). Note: You can also request a legal name change through the N-400 process itself — ask at your interview and the officer can grant it during the oath ceremony.
WHAT TO BRING TO YOUR USCIS INTERVIEW
On interview day, bring originals AND photocopies of everything. The officer keeps the copies and returns the originals.
- Interview appointment notice — printed from your USCIS online account
- Original Permanent Resident Card — you will surrender it at the oath ceremony
- Original passport(s) — current and any expired passports
- Federal tax returns — originals or IRS transcripts, past 5 years
- All documents you submitted with your N-400 — originals of everything
- Any criminal court records — if applicable, bring originals
- Your completed travel record — the list you prepared of all trips
- Marriage certificate + proof of bona fide marriage — if applying under 3-year rule
USCIS interview tip: Bring more than you think you need. If the officer asks for a document you don't have, your case may be continued (adding months) while you gather it. Overpreparing takes 30 minutes; being underprepared costs months.
7 DOCUMENT MISTAKES THAT DELAY N-400 APPLICATIONS
The biggest mistake: Submitting an N-400 before you have gathered everything. One missing document = one RFE = 3 to 6 months of additional wait time. Gather every document first, then file.
FREQUENTLY ASKED QUESTIONS
YOUR PERSONALIZED DOCUMENT CHECKLIST — IN MINUTES
LEGALIAI's document module analyzes your specific situation — country of birth, travel history, marital status, criminal background — and generates your exact document list. No guessing, no RFEs.
GET YOUR CHECKLIST — $49