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. However, you can file many USCIS forms online.To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. USCIS accepts different payment methods depending on whether the benefit requestor resides inside or outside of the United States or the nature of the request.