Document Checklist for Form N-400, Application for Naturalization
All applicants must send the following 3 items with their N-400 application:
A photocopy of both sides of your Permanent Resident Card (formerly known as the Alien Registration Card or "Green Card"). If you have lost the card, submit a photocopy of the receipt for your Form I-90, Application to Replace Permanent Resident Card; and
Two identical color photographs, with your name and Alien Registration Number (A-Number) written lightly in pencil on the back of each photo. For details about the photo requirements, see the N-400 form instructions - or Part 5 of Form M-476, A Guide to Naturalization. If your religion requires you to wear a head covering, your facial features must still be exposed in the photo for purposes of identification; and
A check or money order for the application fee and the biometrics services fee for fingerprinting. (Applicants 75 years of age or older are exempted from fingerprinting and the biometrics services fee). Write your A-Number on the back of the check or money order. You may combine the fees into one check or money order. Make your check or money order payable to "U.S. Department of Homeland Security."