The Renton License Agency is always very busy, so expect to wait in a line that goes out the door when you visit. It's best to try to get there during hours that most people work, avoiding the lunch hour. Mondays and Fridays are the busiest it seems. If you call their office, don't plan on talking to anyone personally. A machine picks up and asks you to leave a message and they will call you back. I was surprised to receive a phone call back the same day though.