A filing fee is required for many immigration forms. If you do not submit the correct fee, we will reject your form.These are generally very affordable and easy to fill out. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. This article provides information on the different payment methods available for paying the filing fees, along with instructions for each method. The 'Pay to the order of' line should say 'US Department of Homeland Security' and the memo should say something like 'I-751 application and biometrics'. Filling Out a Money Order to Pay the Form I-765 Filing Fee. Below is information on filling out sections of a money order. Completing a check or money order, USCIS should provide aids to customers making payments. For example, the Ombudsman recommends providing.