Only Customers with Appointment Reservations Will Be Served for Required In-Person Transactions Effective today, Friday, March 27 the Massachusetts Registry of Motor Vehicles (RMV) is enforcing a strict no walk-in policy at its eight service centers that are open to the general public. Apply for your REAL ID Contact Us Address Registry of Motor Vehicles PO Box 55889, Boston, MA 02205 Directions Online Ask the RMV What would you like to do.