Fill in the recipient's name. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security.Forms ; Summons extra caption. PDF ; Complaint sample. It depends on where you purchased the money order. Did you get it at the post office or Western Union or ? Decide on the money order amount. To view an example of a money order from Western Union, click here. Indicate the Property Registration number on the check or money order. Sample international money order.