Refer to the below instructions to learn how to prepare a money order for your OPT application. Attach: Staple your check or money order and Form.Decide on the money order amount. Handbook F-101, Field Accounting Procedures, has been revised with updated financial procedures for field units. Fill and sign the application form. Complete the Applicant Information Form. Note: This form is not submitted to USCIS with your I-765 application.