What is a V5C Logbook?

The V5C — often just called the logbook — is the document at the heart of every used-car sale. It won't tell you if a car is mechanically sound, but checking it carefully is one of the simplest ways to avoid a fraudulent or problematic purchase.

What the V5C is (and isn't)

The V5C is the vehicle registration certificate. It records details such as the registered keeper's name and address, the make, model and colour, the VIN, the engine number, the date of first registration and the number of previous keepers. It is used to notify official bodies when a car changes hands or is taken off the road.

Crucially, the V5C shows the registered keeper, not necessarily the legal owner. The keeper is the person responsible for the car day to day; the owner is whoever has legal title. On a car bought with finance, the finance company often remains the owner until the debt is cleared — which is exactly why a clean logbook does not, on its own, prove the seller is free to sell.

What to verify at purchase

Before you hand over any money, go through the logbook methodically:

• Seller identity: The name and address on the V5C should match the seller and the location where you're viewing the car. Ask to see photo ID that corresponds.
• VIN and engine number: Cross-check the VIN on the document against the VIN stamped on the car. They must match exactly — our guide to checking a VIN shows where to find it and what tampering looks like.
• Make, model and colour: Confirm these match the car in front of you. A colour change should be recorded; an unrecorded one is worth questioning.
• Previous keepers: The number of keepers should be consistent with the car's age. A very high count on a young car can hint at hidden problems — our guide on previous owners puts this in context.
• Document condition: Check for alterations, correction fluid, mismatched fonts or a photocopy standing in for the original. Genuine certificates have security features and should never be a copy.

Red flags to watch for

• No V5C at all. "I've lost it, I'll send it on" is a common line. Without the logbook you can't properly verify or transfer the car. A genuine seller can request a replacement before selling.
• A photocopy or clearly altered document. This is a serious warning of fraud or a "ringed" (falsely identified) vehicle.
• A trader hiding keeper details. Some sellers obscure the keeper section or refuse to let you read it. A trade seller should still be transparent about the car's background; deliberate secrecy is a reason to walk away.
• Details that don't match the car. Any mismatch between the V5C and the physical vehicle — VIN, engine number, colour — must be explained before you go further.

Back the logbook up with data

The V5C is an important document to inspect, but it should not be relied on alone. Because the logbook cannot tell you about finance, write-offs or theft, pair your checks with a Full Vehicle History Check, which may report available finance, insurance write-off, stolen-vehicle and mileage-discrepancy markers, keeper information and registration changes. An AI Car Check can help interpret available MOT and mileage information; its AI Buy Score and "Would I Buy It?" assessment require both current mileage and asking price.

Remember that AI Reg Check is an independent service, not the DVLA or any official body. These checks are decision support to help you spot problems early — they work best alongside a careful look at the paperwork and the car itself.