Write your address in the purchaser section. Include your account number if you're paying a bill.Check that the money order amount is correct. When filling out a money order, you'll need some basic information, such as the recipient's name and your address. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. Write the name of the payee. Fill out the money order at the counter with a retail associate. Pay the dollar value of the money order plus the issuing fee. Please refer to the annotated image and instructions below to learn how to fill out a check for your OPT application. Passport renewal for adults ages 16 or older (no execution fees apply):.