A filing fee is required for many immigration forms. If you do not submit the correct fee, we will reject your form.Refer to the below instructions to learn how to prepare a money order for your OPT application. You may download and print forms for free from the All Forms page. Please be sure to carefully read and follow the form filing instructions. Filling Out a Money Order to Pay the Form I-765 Filing Fee. Below is information on filling out sections of a money order. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. These are generally very affordable and easy to fill out. In this article we will learn how to pay the EB2 NIW fees to USCIS for your successful DIY green card application.