The V5C registration certificate — commonly called the logbook — is one of the most important documents for road tax purposes. Understanding how to use it correctly prevents problems with DVLA and ensures your vehicle's tax status is accurate.

What Is the V5C?

The V5C is the vehicle's registration certificate issued by DVLA. It proves who is the registered keeper of the vehicle and records key vehicle details including the make, model, engine size, CO2 emissions figure, first registration date, and vehicle identification number. The V5C is not proof of ownership — the actual owner may be a finance company if there is outstanding finance on the vehicle.

The V5C Sections

The V5C is divided into several sections. Section 1 contains your vehicle details. Section 2 is the keeper's details. The green slip (V5C part 1) is given to the new keeper when you sell. The yellow slip (V5C part 2) is sent to DVLA by the seller to notify the sale. The white slip (V5C part 1A) is for keeper transfer notification. The blue slip (V5C part 2) is the seller's notification of sale.

Using the V5C for Road Tax

To tax your vehicle at GOV.UK or the Post Office, you need the V5C reference number — the 11-digit number on the front of the V5C, top right. You do not need to have the physical V5C in your possession to tax, but DVLA must have your name registered as keeper for you to tax the vehicle. If the V5C is with the finance company, you may need to contact them.

Updating the V5C

You must update the V5C if you change your address — within 14 days. You must also update it if you make modifications to the vehicle that change its description — for example, changing the engine. DVLA can fine you up to £1,000 for failing to update your address. The updated V5C arrives by post within a week of applying — or you can apply online at GOV.UK.

If You Lose the V5C

If you lose your V5C, you can apply for a replacement online at GOV.UK for £25. DVLA will send a new V5C with a new V5C reference number. If the vehicle is subject to outstanding finance, the replacement V5C is sent to the finance company, not you. Always check with your insurer and any finance company before applying, to ensure the vehicle details on the replacement V5C are correct.

V5C and Tax Refunds

When a vehicle changes keeper, the previous keeper's road tax is refunded for any full remaining months. DVLA processes this refund automatically when the sale is notified. The refund is calculated from the start of the month following the month the sale was notified. If you sell and do not notify DVLA, you continue to be liable for road tax — and the refund does not happen.

Buying a Vehicle Without a V5C

You should never buy a vehicle without a V5C. The absence of a V5C suggests the vehicle may have been written off, stolen, or has outstanding finance. Ask the seller to apply for a replacement V5C before proceeding — or walk away. A vehicle without a V5C cannot be legally taxed in your name, and you cannot register as the keeper.