In Georgia, stacking refers to adding up multiple uninsured motorist policies. There may be multiple uninsured motorist policies available to you. For example, some insurers, such as State Farm, issue a separate auto insurance policy for each vehicle in the home. In addition, you may be entitled to coverage under other uninsured motorist policies besides your own. You may have coverage through a relative who resides with you or a policy covering a vehicle you are riding in as a passenger.