Make the money order payable to U.S. Department of Homeland Security. A filing fee is required for many immigration forms.If you do not submit the correct fee, we will reject your form. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. If you do not have a receipt number that begins with IOE, you do not have an OAN. The receipt number is the unique case number the USCIS assigns to each applicant after receiving their petition. You can also find the edition date at the bottom of the page on the form and instructions. Please review USCIS's website for the filing fee amount. If using a check or money order payable to "US Department of Homeland Security. Your money order should be included with your other application materials.