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N-400

Application for Naturalization

Apply for U.S. citizenship through naturalization.

When this applies to you

  • You've held a Green Card for at least 5 years (or 3 via marriage to a U.S. citizen)
  • You meet the physical presence and continuous residence requirements
  • You can demonstrate good moral character
  • You're ready to take the civics and English tests

Documents you'll need

You upload these while filling out the form. You can start now and add them as you go.

  • Your Green Card — front

    The side with your photo. This is the one I read to prefill your application.

  • Your Green Card — backOptional

    USCIS wants a copy of both sides. Skip this if your file above already shows both.

  • The photo page of your passportOptional

    Used to confirm your name, date of birth and nationality.

  • Your driver's license or State ID — frontOptional

    Optional, but it carries your address, height and eye color — questions you then won't have to answer.

  • Your driver's license or State ID — backOptional

    Only if your address is on the back rather than the front.

  • Your marriage certificate
  • Proof that your prior marriages endedOptional

    Divorce decree, annulment decree or death certificate, for each marriage that ended.

  • Proof of your spouse's U.S. citizenship

    U.S. birth certificate, Certificate of Naturalization or Certificate of Citizenship. USCIS wants the last 3 years covered.

  • Proof that your spouse's prior marriages endedOptional
  • Your certified Form N-426

    Request for Certification of Military or Naval Service, if you're currently serving. If separated: DD-214, NGB Form 22 or your discharge orders.

  • Your Form N-648, completed by your doctor

    Medical Certification for Disability Exceptions. Without it, the English and civics exemption won't be granted.

  • Court records for every offense you declared

    Arrest record, court disposition, proof the sentence was completed. Required even if the case was dismissed, expunged or sealed.

  • Your Selective Service Status Information Letter

    Request it at sss.gov when you should have registered and did not.

  • Your proof of income

    Tax returns, pay stubs or a benefits letter — whatever proves your household is below the threshold.

  • Two passport-style photographsOptional

    To go in the envelope, not uploaded: USCIS wants two printed 2x2-inch color photos on a white background, taken within the last 30 days. Required only if you live outside the United States.

How the filing works

  • 20 guided sections in your language. We only ask the questions that apply to you.
  • Your answers are saved as you go, so you can stop and come back
  • We fill the official USCIS PDF and you sign it online