How can a parent remove a child from an auto insurance policy after he's turned 18 years old and has moved away from home?

Just call up your insurance company/agent, and tell them that you request his name to be removed from your policy. They will then issue you a new policy w/ id cards.

Some insurance companies require that the 18 year old has acquired auto insurance elsewhere before removing them from the parent's policy. This may prove difficult for the parent who may be forced by the insurance company to carry auto insurance on their child indefinitely until such a time when insurance can be obtained.