If the vehicle is registered in your name you must return the one remaining plate and obtain a new set of two plates with a different number. If you wish, you may order the original set to be remade. These will be re-issued to you after the mandatory 90-day waiting period, or about three months. You also need to bring your current Rhode Island drivers license and insurance information. If the vehicle is registered to a leasing company you will have to show a Power of Attorney form from the leasing company authorizing you to change the plate.