Use this form to report suspected criminal activity. Be as specific and as detailed as possible.This document discusses different types of optional practical training (OPT) including: required forms, processes, and updating SEVIS. This form is for reporting suspected immigration benefit fraud and abuse to USCIS. The following resource is meant to answer some of the most common questions that students have regarding regular, initial 12 Month OPT. This guide is to help you successfully complete and submit an application for Post-Completion OPT or the. STEM OPT Extension to USCIS. The US government agency responsible for the Form I-983 has created a document with detailed instructions on how to fill it out. If a student's OPT application is denied, they will receive an OPT Denial Notice from USCIS within 2 weeks, explaining the reason for the denial. This guide is to help you successfully complete and submit an online I-765 application for Post-.