A car log book, often called a vehicle logbook or registration logbook, is an official record that links a vehicle to its registered owner and contains key details about the car.
In this evergreen explainer, we describe what is typically recorded in a car log book, how it is used in day-to-day ownership and legal checks, and what to do if you are updating or replacing your log book.
What Information a Car Log Book Holds
While contents can differ slightly by country and issuing authority, most car log books record core identification and ownership details rather than a full service history.
Typical Core Fields
Expect to see the registered keeper’s name and address, the vehicle’s unique identifier (VIN or chassis number), engine number, make and model, colour, and any applicable tax or inspection status marks.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Registered keeper name | Name and address as recorded with the licensing or motor authority | Official registration database |
| Vehicle identification number (VIN) | Sole chassis or vehicle code | Manufacturer and registration records |
| Engine number | Engine build number as registered | Manufacturer and test records |
| Make and model | Manufacturer and variant | Type approval data |
| Registration mark | Current number plate | DVLA or equivalent |
| Tax and inspection status | Current tax class and MOT expiry where shown | Government tax and test records |
Common Uses of a Car Log Book
Log books help authorities and individuals confirm who is responsible for a vehicle and whether key identifiers match official records.
- Ownership confirmation when buying or selling a car
- Identity checks by law enforcement or during roadside stops
- Tax and insurance verification for finance or leasing companies
- Basic record-keeping for warranty or recall checks
Log Books vs Service Histories
It is important to distinguish a log book from a service history record.
A log book confirms registration and key identifiers; it does not usually list repairs, part replacements, or dealership visits. Service histories are maintained separately by owners, garages, and dealers and provide a more complete picture of maintenance and mileage over time.
What to Do When Your Log Book Is Lost or Damaged
If your log book is lost, stolen, or significantly damaged, you can usually apply for a replacement through the same authority that issued the original.
In many regions, you can request a duplicate online or by post, and there is typically a small fee. You will generally need to prove your identity and ownership, such as with a photo ID, address proof, and vehicle registration details.
Updating Personal Details in the Log Book
When you sell a car or change your name or address, you may need to update the registered keeper information.
- Inform the relevant motor or licensing authority
- Provide proof of the change, such as a marriage certificate, deed poll, or new address documentation
- Keep any updated documentation for your records
Legal and Practical Considerations
Presenting an up-to-date log book can make ownership transfers smoother and may be requested by buyers, sellers, or lenders.
Be cautious of anyone asking to see only the log book without additional verification, since documents can be copied or, in rare cases, falsified. Cross-check vehicle identification numbers and registration marks against official sources when in doubt.