In the Memo or "For" section, write "USCIS I-765" and your SEVIS ID number, found in the in the upper left-hand corner of your I-20. A filing fee is required for many immigration forms.If you do not submit the correct fee, we will reject your form. This article provides information on the different payment methods available for paying the filing fees, along with instructions for each method. The receipt number is the unique case number the USCIS assigns to each applicant after receiving their petition. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. Decide on the money order amount.