Delays are usually caused by additional security and background clearances due to your citizenship, ties to specific countries, or field of study. These additional clearance checks may take several weeks to several months to process. There is no way to circumvent or expedite this process. If a security check is going to delay your arrival to the University of Michigan, please notify your academic department directly. Department policies for late arrival vary. Additional assistance may be requested through the M-Passport portal > Requests > Visa Assistance.