If you move and don't change your address on your driver's license, you could face a number of penalties. For one, you may not be able to renew your license when it expires if the Ministry of Transportation (MTO) has your old address on file. You may also be fined if you're pulled over by the police and they see that your address is out of date. In addition, if you're in an accident, your insurance company may not cover you because they didn't have your current address on file. So it's important to keep your driver's license up-to-date with your current address.