What is a Selective Service number on Form N-400?


All male U.S. citizens and immigrant non-citizens between age 18 and 25 must register with the Selective Service.

If you are preparing Form N-400, Application for Naturalization, you'll need to provide your Selective Service number and the date registered (Part 12, Question 44).

Did you know minor mistakes on your N-400 application can result in costly delays?
Prepare your N-400 with us in about 40 minutes. CitizenPath guides you through the complete application process and provides help to answer questions such as this one. Our personalized filing instructions will allow you to file your application today knowing that you did everything right!

Obtaining proof of your Selective Service registration is easy. Use the Selective Service Online Verification. You'll need to provide a last name, Social Security number, and date of birth. You will instantly be provided with a verification letter than can be printed or saved to your computer.

Enter the information on your Form N-400 application. Save a copy of the Selective Service verification letter for your records.

If you did not register for Selective Service, read Failing to Register for Selective Service so that you understand the consequences and how to proceed.

Citizenship Resource Center
Find additional support articles and naturalization information in the Citizenship Resource Center
Naturalization Requirements  |  Citizenship Cost Calculator
What Happens After Filing N-400  |  How to Prepare for Citizenship Test
Citizenship Blog Articles

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