Driving an unregistered vehicle is a serious offence that can have far-reaching and catastrophic consequences. It's a scary thought when you think about what could happen if your vehicle is unregistered. Making sure cars are roadworthy is a big part of the registration system. It's also about protecting people every vehicle must be registered to be covered by compulsory third party insurance. This insurance makes sure that everyone is covered for personal injury if someone is hurt in a crash.