Documents Needed to Buy a Used Car UK: What You Must Have Before Driving Home

There’s a small panic that sets in about twenty minutes after you’ve shaken hands on a used car. The seller’s smiling, the kettle’s on, and it dawns on you that there’s a legal line between I’ve bought a car and I’m allowed to move it.

The paperwork isn’t complicated. It’s just unforgiving. Miss one piece and you’re technically driving uninsured, untaxed or without a valid MOT — the sort of thing that turns a nice Saturday into a court letter.

The five things to sort before you turn the key

Before the car moves an inch on a public road, you need:

1. Valid insurance in your name (or you as a named driver) for that specific car.
2. Vehicle tax in your name — it never transfers from the seller.
3. A valid MOT if the car is over three years old.
4. The V5C/2 green slip, or at least its reference number, so you can tax it.
5. A receipt showing what you paid, when, and for which car.

Everything else is nice to have. Let’s take them one at a time.

Insurance on day one

You cannot drive on a public road without at least third-party cover. That means cover on the specific car, in your name, from the moment you pull off the drive.

If you already have a policy

Most insurers will let you swap cars mid-term, but you must do it before you drive away. Ring them from the seller’s driveway, or use the app. Two questions: what’s the new premium, and is there an admin fee? Expect £25–£50, though some insurers waive it.

If you’re starting fresh

Get quotes before you go, using the registration. Temporary cover — sometimes called driveaway insurance — costs roughly £20–£40 for a day or two. Not cheap per day, but far cheaper than driving uninsured, where fines start at £300 and can be unlimited.

Don’t rely on the seller’s policy

Their insurance ends the moment they tell their insurer the car is sold. You can occasionally be added as a named driver for the trip home, but plenty of insurers won’t allow it. Treat it as a bonus, not a plan.

One diary note: continuous insurance enforcement means an uninsured car that isn’t SORN’d can attract a £100 penalty even if it’s just sitting on your drive. Insure it the day you buy it.

Tax — there is no grace period

This one catches out more buyers than anything else. Vehicle tax is not transferable. The seller’s tax stops the instant ownership changes, and you must tax the car before you drive it — including the drive straight home.

You can do it on your phone in about three minutes on gov.uk, using the 12-digit reference number from the green V5C/2. You’ll need the registration and a debit or credit card. The tax starts instantly.

Drive untaxed and you’re looking at a fine of up to £2,500, plus an invoice for the unpaid tax. There’s no defence of being on your way to sort it.

If the car has been declared SORN, it can’t be driven on the road at all until it’s taxed — and SORN only ends when you tax it.

The V5C and the transfer

The V5C is the log book: DVLA’s record of who keeps the car. It isn’t proof of ownership on its own, but it’s the document that makes everything else work.

What to check on the V5C

• The seller’s name and address should match their ID and where you’re standing.
• The document reference number should be printed, not handwritten.
• The VIN on the V5C should match the one on the car — usually visible at the base of the windscreen or on a door pillar.
• Watch for markers reading scrapped, exported or insurance write-off.

The green slip

When a private seller sells, they fill in section 6 with your details, tear off the green V5C/2 and hand it to you, then post the rest to DVLA. You keep the green slip until your new V5C arrives — usually two to four weeks.

If they’ve notified DVLA online instead, ask exactly what they did and make sure you leave with the reference you need to tax the car. Get it in a text or email if you can.

If the V5C is lost, you can apply yourself using a V62 form and a £25 fee, but you can’t tax the car the usual way in the meantime. Think hard before agreeing to that.

MOT — check it, don’t trust it

Cars over three years old need a valid MOT to be on the road. You can check any car’s MOT status and full history free on gov.uk. Do it before you travel to view, not after you’ve paid.

Look for:

• Expiry date — weeks away or months away?
• Advisories — the amber warnings that flag what’s about to fail.
• Mileage records — do they tally with the odometer in front of you?

There’s no paper MOT certificate any more; it’s all electronic. A seller saying it’s in the post is a red flag.

If the MOT has expired, the only legal way to drive the car is straight to a pre-booked test. Not home. Not to the shops. Straight there.

What a private seller must legally hand over

By law, a private seller has to:

• Complete and sign the V5C, including section 6 with your name and address.
• Give you the green V5C/2 slip, or make the DVLA change themselves and give you what you need to tax it.
• Notify DVLA of the sale, usually within a few days.

A receipt isn’t a legal requirement, but get one. A handwritten note with the date, time, price, mileage, registration, both names and both signatures is worth its weight if anything turns out to be misdescribed.

What they must not do is sell you a car that’s still on finance. If there’s outstanding HP, the finance company owns it, not them. A £10–£20 history check tells you in seconds.

Your 60-second check before you drive off

• Insurance live for this car — confirmed on the phone, not assumed.
• Taxed in your name on gov.uk — screenshot the confirmation.
• MOT valid, with a sensible expiry date.
• Green V5C/2 in your hand, details matching.
• VIN on the car matching the V5C.
• Receipt signed and dated.
• Both keys, if there were two.

Do those seven and the drive home is just a drive home.

If you’d rather not do all this detective work in someone’s front garden, it’s worth buying from a dealer who handles the paperwork properly from the start. UpCars.uk is a good place to look when you’re ready — every car is checked over before it’s listed, so the boring legal bits are already sorted.