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. Decide on the money order amount.I'm gonna give you some brief information on how to fill out a money order. Use numerals to show the exact dollar amount of the fee for the service you are requesting. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. Make sure that you make it out to US. Department of Homeland Security. And yes, you do have to spell out that entire name. Gov with a USCIS Officer. This article provides information on the different payment methods available for paying the filing fees, along with instructions for each method. Enter the receipt number of the pending immigration application on.