N-400, Application for Naturalization

Purpose of Form

To apply for U.S. citizenship.

Number of Pages

Form 20; Instructions 18.

Edition Date

09/29/16. USCIS will also accept the 09/13/13 and 03/26/16 editions until 12/22/16. You can find the edition date at the bottom of the page on the Form and Instructions.

Where to File

1.  All Applicants (Exception: See 2 below if you are a former member of the military, spouse of current member of the military, or close relative of deceased member of the military.)

If you live in...Please send your application to:

North Dakota
South Dakota
Territory of Guam
Commonwealth of the
Northern Mariana Islands

P.O. Box 21251
Phoenix, AZ 85036

For Express Mail or courier deliveries, use the following address:

Attn: N-400
1820 E. Skyharbor Circle S
Suite 100
Phoenix, AZ 85034

District of Columbia
New Hampshire
New Jersey
New Mexico
New York
North Carolina
Rhode Island
South Carolina
West Virginia
Commonwealth of Puerto Rico
U.S. Virgin Islands
P.O. Box 660060
Dallas, TX 75266

For Express Mail or courier deliveries, use the following address:

Attn: N-400
2501 S State Hwy 121 Business
Suite 400
Lewisville, TX 75067

2.  Applications from Current or Former Members of the Military, Spouses of Current Members of the Military, and Close Relatives of Deceased Members of the Military

All naturalization applications filed under the military provisions, sections 328 or 329 of the INA, must send your application to the Nebraska Service Center (NSC) regardless of where you live and whether you are filing from within the United States or abroad.  If you are the spouse of a current member of the military, or are the close relative of a deceased family member (319(d)), send your application for naturalization to the NSC regardless of where you live and whether you are filing from the within the United States or abroad.  Send your application to:

          Nebraska Service Center
          P.O. Box 87426
          Lincoln, NE 68501-7426

For Express Mail or courier deliveries, use the following address:

          Nebraska Service Center
          850 S. Street
          Lincoln, NE 68508

E-Notification:  If you are filing your Form N-400 at one of the USCIS Lockbox facilities, you may elect to receive an e-mail and/or text message notifying you that your application has been accepted.  You must complete Form G-1145, E-Notification of Application/Petition Acceptance, and clip it to the first page of your application.  To download a copy of Form G-1145, including the instructions, click on the link at the top of the page.

Additional Information for Completing Your Form:

If you submit Form N-400 on paper: Be sure to sign the form at Part 13, Applicant’s Statement, Certification, and Signature. The fillable version of Form N-400 now includes “Don’t forget to sign!” messages and an arrow pointing to the signature box as reminders for when you print the completed form for mailing. USCIS rejects any unsigned Form N-400. Having to return it to you for a signature will delay processing of your application.

3.   Create a USCIS online account for N-400 Applications

Beginning April 13, customers who submit the revised Form N-400, Application for Naturalization (dated March 26, 2016) may be invited to create a USCIS online account to track and manage their case online depending on how their form is processed.

If you submit the revised Form N-400, you may receive a USCIS Account Acceptance Notice in the mail with instructions on how to create a USCIS online account.  USCIS will continue processing your application even if you choose not to access your online account.  USCIS also will continue to send you copies of notifications about your case by mail through the U.S. Postal Service.

Having a USCIS online account allows you to:

  • Check the status of your case;
  • Receive notifications and case updates;
  • Respond to requests for evidence; and
  • Manage your contact information online, including updating your address.

If you are an attorney or accredited representative, you can also create a USCIS online account, which will allow you to manage all of your clients’ Form N-400 applications in one place.

Note for Attorneys and Accredited Representatives: You should have only one USCIS online representative account.  When you receive an Account Acceptance Notice for a paper form filed at a USCIS Lockbox on behalf of your client, please ensure that you enter the same personal information that you provided on the Form G-28 submitted with your client’s original application, petition, or request.  If the information you use to access your online representative account does not match the information you provided on the Form G-28, you may be unable to access your client’s case.

At this time, you cannot submit Form N-400 applications online.

Still need help?

Use the online help form to contact our Customer Contact Center if you need assistance with:

  • Technical issues with your USCIS online account;
  • Forgotten user ID or password reset for your USCIS online account; or
  • Information about your USCIS application.

Filing Fee

$595 (Add $85 biometric fee for a total of $680, where applicable. See exceptions below.) You must make your check payable to Department of Homeland Security. Fees are accepted in the form of a money order, personal check, cashier's check, or credit card payment using Form G-1450, Authorization for Credit Card Transactions.

Exceptions in which the applicant is not required to pay the entire $680:

  • Applicants 75 years of age or older are not charged a biometric fee, the total fee is $595.
  • No fee is required for military applicants filing under Section 328 and 329 of the INA

Special Instructions

Please noteA Guide to Naturalization (Form M-476) provides important information about citizenship eligibility requirements and processing procedures. The Form N-400 application instructions often refer to information in the Guide. Therefore you should read the Guide carefully before filing this form.

Important filing tips, as well as additional information on fees and customer service, are listed on our Lockbox Filing Tips webpage.

To ensure your Form N-400 is accepted at a Lockbox facility:

  • Sign your form
  • Submit the correct fee
  • Fill out the form completely and accurately, particularly these required fields:
    • Current Legal Name
    • Information About Your Eligibility
    • Date of Birth
    • Country of Birth
    • Mailing Address

Notice: Individuals who file Form N-400, Application for Naturalization, and later appear at the Application Support Center (ASC) for biometric capturing are required to submit to a photograph and signature process. If USCIS determines you are eligible for naturalization, this photograph taken at the ASC may be digitally placed on your Certificate of Naturalization. Therefore, USCIS recommends that on the day of your ASC appointment, you dress in clothing that is acceptable for display on your Certificate of Naturalization. USCIS will not reject a photograph for use on your Certificate of Naturalization or issue a replacement certificate based solely upon your desire to modify the photograph shown on your certificate.

Note: USCIS has the general authority to require and collect biometrics (fingerprints, photograph, and/or digital signature) from any applicant, petitioner, sponsor, beneficiary, or other individual residing in the United States for any immigration and naturalization benefit. See 8 CFR 103.2 (b)(9). 

This version of the N-400, Application for Naturalization, is available above in two files - the instructions and the form itself. We recommend that you download the form directly to your local computer, rather than fill it out through your web browser.

Attorney or representative: You may be represented, at no expense to the U.S. Government, by an attorney or other duly authorized representative.  Your representative must submit Form G-28, Notice of Entry or Appearance as Attorney or Representative, with your Form N-400.  Your representative may also submit Form G-28 at the time of your interview.

This page can be found at https://www.uscis.gov/n-400

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