U.S. Immigration and Customs Enforcement (ICE) has started to conduct site visits of employers who employ F-1 students on STEM Optional Practical Training. Please visit https://studyinthestates.dhs.gov/employer-site-visits for details on these site visits.
Employers need to make sure their front line employees request identification and a business card from the ICE officer, and to have the officer wait until a designated person at the worksite is present to accompany the ICE officer during the visit, which typically lasts 1-2 hours according to recent reports.