When completing your US naturalization application, you must submit the required naturalization documents, photographs, and filing fees along with your completed Form N-400, Application for Naturalization. All naturalization applicants must send a photocopy of their Permanent Resident Card, or green card, along with other case-specific requirements.

Naturalization Documents Checklist

When you apply for naturalization, be sure to include the following required naturalization documents with your application.

  • Photocopy of permanent resident card, or green card (front and back sides)
  • Form G-28 (only if an attorney is representing your case)
  • Form N-426 (only if you are seeking citizenship based on your current U.S. military service)
  • Document showing your legal name change (such as marriage certificate) if the name on your green card is not the same as your current legal name
  • If your application is based on your marriage to a US citizen:
    • Proof your spouse was a US citizen for the past three years in the form of a birth certificate, naturalization certificate, US passport, or Form FS-240
    • Marriage certificate
    • Proof of past divorces and/or deaths of spouses
    • Federal tax return information for the past three years or that of your children
  • If you have traveled outside of the United States lasting more than six months after becoming a Permanent Resident:
    • Evidence that you kept close ties to the US, such as an IRS tax return transcript or rent payment receipts
  • If you have dependants who are not living with you (spouse or children):
    • Any court document ordering financial support, or evidence of financial support (cancelled checks, receipts, letter from your children's guardian, etc.)
  • If you have ever been arrested by a police officer:
    • Original official statement from the police or court stating no charges were filed
    • Original or court-certified copy of complete record for each incident if charges were filed
    • Original or court-certified copy of your probation record or evidence of completing rehabilitation program, if applicable 
  • If an arrest or conviction has been removed from your record:
    • Original or court-certified copy of the court order removing the arrest or conviction; or
    • A statement from the court stating that the removed records do not exist
  • If, since becoming a Permanent Resident, you ever failed to file a tax return with the IRS:
    • All letters, emails, or other correspondence about the lapse
  • If you have any overdue taxes (federal, state, or local):
    • Evidence that you have filed the necessary forms and made arrangements to pay all overdue taxes (signed agreement with the tax agency); and
    • Documentation from the tax agency about your current status (how much has been paid, current balance, etc.)
  • If your disability affects your ability to take the citizenship test:
    • Form N-648, completed and signed less than six months ago by a licensed physician or clinical psychologist
  • If you are a male under age 26 who lived in the US since age 18 and did not register with the Selective Service:

Naturalization Photo Requirements

Along with your completed Form N-400 application form, filing fee payment, and required naturalization documentation, you will need to provide 2 identical photographs of yourself. These are passport-style photographs, which are available at most U.S. Post Office locations and some retail pharmacies. The naturalization photos must be taken within 30 days of filing your completed naturalization form. 

The photo requirements for naturalization are listed below:

  • Full color; if taken with a digital camera, its resolution must be at least 3.5 megapixels
  • Size: 2 inches by 2 inches
  • Full frontal view of face (head between 1 inch and 1 3/8 inch from top, chin between 1 1/8 and 1 3/8 inch from bottom)
  • Head must be completely bare, unless wearing an item of clothing for religious reasons – but face must be visible
  • Background must be white or off-white
  • On thin, glossy paper
  • Unmounted and unretouched

When you have received your photographs, lightly write your Alien Registration Number on the back of each print.