Guide: What to do if USCIS shows up at the office U.S. Citizenship and Immigration Services has the authority to conduct site visits at any location with H-1B employees — including home offices. Make sure your employees know what to do. Download this guide to get guidance from immigration experts on: Establishing clear and efficient procedures for reception, security and other company representatives Training foreign national employees on how to prepare for and respond to potential site visits at home Preparing your team on potential questions and typical document requests