Use this form to replace your Green Card. Make the money order payable to U.S. Department of Homeland Security.You must mail your check, bank draft, or money order together with your benefit request form. As long as the US Department of Homeland Security is the payee, USCIS does not care what address you put on the money order. Use the following guidelines when you prepare your checks or money orders for the Form I-131 filing fee and biometric services fee: 1. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. Form N-400 is used to apply for U.S. citizenship. Filing this form is the first step of naturalization to become a U.S. citizen. The USCIS will reject any form that is unsigned. Completing a check or money order, USCIS should provide aids to customers making payments.