Why do you register a car and how do you tell if it is registered?

By law, cars must be registered in order to legally operate them on public roads. Even if you had a truck that you used only on your farm, though, you would still want to register it as registration provides some form of proof of ownership. Cars you own usually should be registered to you. To find out if it is registered, ask your local motor vehicle division or law enforcement agency, they can check. You will need to provide the VIN.