At the time that you call to find out about location and charges from the impound, ask what documents you will need to provide to retrieve your car. Generally, you’ll be asked for your driver’s license, proof of ownership, proof of insurance, and current registration. Also, if there were any traffic fines, they will probably have to be paid before you get your car back. You might have to fill out some forms, too. If you don't have proper registration and proof is required, you'll have to register the vehicle before being able to retrieve your car.