Logbook in legal terminology is known as registration form V5. The document is issued by Driver and Vehicle Licensing Agency (DVLA). Logbook has several entries about the vehicle relating to the current registration mark, VIN number or the chassis number, and details about the registered keeper of the logbook. The registered keeper need not necessarily be the owner of the vehicle. He is the person who is responsible for paying taxes on or representing in cases of offences related to the vehicle.