There isn't a consent form. What I would recommend is contacting the insurance company and advising them of the situation to see what they can do to remove you from the policy. You will also need to get your own policy. Make sure the new policy is in place before you have yourself removed from the current policy. Good luck, and if you have any questions, don't hesitate to ask
If you'd like more information regarding the impact of divorce on your car insurance policy, see here.