N-426, Request for Certification of Military or Naval Service
Applicants for naturalization use this form to request that the Department of Defense verify their military or naval service.
What This Form Can Help You Do
03/09/23. Starting May 22, we will only accept the 03/09/23 edition. Until then, you can also use the 03/01/21 and 09/16/19 editions. You can find the edition date at the bottom of the page on the form and instructions.
Dates are listed in mm/dd/yy format.
If you complete and print this form to mail it in, make sure that the form edition date and page numbers are visible at the bottom of all pages and that all pages are from the same edition of the form. If any of the form’s pages are missing or are from a different edition of the form, we may reject your form.
If you need help downloading and printing forms, read our instructions.
Form N-426 should be filed or uploaded with the electronic Form N-400 or, if submitting by paper, using the direct filing address for the Form N-400.
If you received a Request for Evidence asking you to submit a Form N-426, return the Form N-426 to the office that requested the certification.
Filing Tips: Go to our Tips for Filing Forms by Mail page for information on how to help ensure we will accept your application.
Don’t forget to sign your form. We will reject any unsigned form.
Please read the instructions carefully. If relevant, please see our M-599, Naturalization Information for Military Personnel (PDF, 421.7 KB) brochure.
If you are claiming eligibility for naturalization based on your service in the U.S. armed forces and you are currently serving, you must submit a signed and certified Form N-426 with your Form N-400, Application for Naturalization. Only authorized military personnel may certify your Form N-426. Please review your branch’s policy regarding who is authorized to certify.
If you previously served in the U.S. armed forces, do not submit Form N-426. Instead, submit a copy of your DD Form 214, Certificate of Release or Discharge from Active Duty; NGB Form 22, National Guard Report of Separation and Record of Service; or an equivalent discharge document for all periods of service.