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. I'm going to show you how to fill out a money order from the USPS or the United States Postal Service.Complete one Form G1450 for each card. Yes, the case is received but it can take some time to get it in the system. Double check the address on the paperwork you sent to make sure it's correct. How to Fill Out Form I-945. 1. Type or print legibly in black ink. 2. To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. For detailed instructions or for assistance on how to make an I-901 SEVIS Fee payment, call the SEVP Response Center at 703-603-3400. You can also find the edition date at the bottom of the page on the form and instructions.