You are required to change your address on your motor vehicle registration(s) within 10 days of the change C.R.S. 42-3-113(9). To change your address contact us in person, by mail, or online. An I.D. is required in person. You must have a Power of Attorney if doing for someone else. By mail please include a DR 2842 (PDF) and a DR 2444 (PDF) stating the changes you would like to make.