Most of what goes wrong with a used-car purchase comes down to paperwork, or the lack of it. A clean, complete set of documents is one of the strongest signals of a genuine, well-kept car. A missing logbook, a name that does not match or a suspiciously thin folder of history is often the first sign of trouble, whether that is a cloned car, an undisclosed write-off or simply years of skipped servicing.

The problem is that the documents can look convincing to an untrained eye, and one of them is widely misunderstood. This guide explains what the V5C logbook actually proves (and, crucially, what it does not), how to check it is genuine, and which other pieces of paper you should insist on before you hand over any money.

The V5C logbook: what it does and does not prove

The V5C, universally called the logbook, is the DVLA registration certificate. The single most important thing to understand is this: the V5C shows the registered keeper, not the legal owner. The registered keeper is simply the person responsible for the car (taxing it, receiving fines), which is often but not always the owner. A car on finance, for example, is legally owned by the finance company even though a private individual is the registered keeper.

That distinction matters because it is the gap that scammers exploit. Someone can be the registered keeper on a genuine V5C and still not be entitled to sell you the car outright.

To check a V5C is genuine, look for:

The “DVL” watermark. Hold the document up to the light and you should see “DVL” repeated across it. The paper also has a distinct texture and colour.
Matching details. The seller’s name and address must match. The make, model, colour, engine size and VIN on the V5C must match the car and the advert exactly.
Known stolen serial ranges. Blank V5C documents have been stolen in the past. Treat serial numbers in the ranges BG8229501 to BG9999030 and BI2305501 to BI2800000 as a serious warning sign and walk away.

If the seller only has a “new keeper” slip and no full V5C, or the document looks freshly printed, be very cautious.

Check the VIN against the V5C to catch cloning

Cloning is where a stolen car is given the identity of a legitimate one, using copied number plates, a re-stamped VIN and a forged V5C. Your defence is to check the vehicle identification number physically and match it to the document.

The VIN appears in three places on the car:

On the dashboard, visible through the windscreen at the base.
On a plate or sticker on the driver’s side door pillar.
Stamped in the body under the bonnet.

All three must match each other and match the V5C exactly. Any sign that a VIN plate has been tampered with, replaced or does not agree with the others is a reason to stop. We go deeper into this and the other scams in clocking, cloning and outstanding finance in the UK.

Service history and MOT records

Beyond the logbook, the paperwork that tells you how the car has been looked after is the service history and the MOT record.

Service history. Look for a stamped service book, or invoices and printouts from garages, showing regular servicing at sensible intervals. Cross-check the mileage written at each service against the MOT record. If a service claims a lower mileage than an earlier MOT, the paperwork is either forged or hiding a clock.
MOT history. Run the free Check MOT history tool on GOV.UK (gov.uk/check-mot-history). It lists every test since 2005 with the recorded mileage each time, plus advisories and failures. This is the best free defence against clocking and a clear picture of the car’s recurring weak spots. Remember the first MOT is due at three years old, then every year, and the maximum test fee is £54.85. Cars over 40 years old are generally exempt.

If the service history is thin but the MOT record is clean and the mileage rises steadily, the car may still be fine. If both are patchy, factor that into your offer or walk away.

What the free checks will not tell you

The free GOV.UK tools are excellent for MOT history, tax status and confirming the make, colour and engine. But they have real limits. They will not reveal:

Outstanding finance. If money is still owed, the finance company legally owns the car and it can be repossessed, even from an innocent buyer. The Hire Purchase Act 1964 offers some protection to a private buyer acting in good faith, but you should never rely on it. Ask for a settlement figure and pay the finance company directly.
Write-off category. A car recorded as Cat A, Cat B, Cat S or Cat N has been an insurance write-off. Cat S and Cat N cars are legal to buy but must be disclosed, and they affect insurance and resale value.
Stolen markers or the number of previous keepers.

For anything but the cheapest runaround, this is why a paid history check is worth the money. We compare the two in free GOV.UK checks vs a paid HPI check.

The moment you hand over money

When everything checks out, handle the transfer properly. The seller notifies the DVLA of the change of keeper, either online or by post, and gives you the green “new keeper” slip. You will receive an updated V5C in your name in the post. Get a written receipt with the date, price, both names and addresses, the registration and the VIN, signed by both parties. Tax the car before you drive it away, because road tax no longer transfers with the car.

Bring it all together with MotoPPI

Checking a V5C, matching three VINs, reading an MOT record and chasing down a finance settlement is a lot to juggle at a stranger’s kerbside. MotoPPI brings it into one place: a vehicle history check across more than 20 databases, a model-specific inspection checklist, a repair-cost estimate and the arguments to negotiate down. Your first check is free, and it is on the App Store now.

Download MotoPPI on the App Store and check the paperwork on your next car for free.

Frequently asked questions

Does the V5C prove who owns the car?

No. The V5C shows the registered keeper, the person responsible for the car, not the legal owner. A car on outstanding finance is owned by the finance company even though a private individual holds the V5C. Always check for outstanding finance separately.

How do I know if a V5C is genuine?

Hold it to the light for the “DVL” watermark, check the paper texture, and confirm the name, address and all vehicle details match. Avoid the known stolen serial ranges BG8229501 to BG9999030 and BI2305501 to BI2800000.

What paperwork should I get when buying a used car?

The full V5C (not just a new keeper slip), service history or garage invoices, and a written, signed receipt showing the price, both parties’ details, the registration and the VIN. Then check the MOT history for free on GOV.UK.

What if the seller only has the new keeper slip?

Be cautious. Without the full V5C you cannot verify the details properly, and it can make re-registering the car harder. Ask why the full document is missing and consider walking away if the answer is unconvincing.

V5C Logbook and Paperwork When Buying a Used Car