How to Check if a Horse Trailer or Horsebox Is Stolen

Before paying a deposit on a used horse trailer or horsebox, check its identity as carefully as you check its condition. The seller's paperwork, the identification numbers on the trailer or vehicle and a suitable history check should all be considered together.

It is worth the effort. The Equipment Register, a UK database of stolen plant and trailers, reported in 2024 that around one in ten checks run against its records matched an item recorded as stolen. Roughly half of the 1.6 million items on that database are trailers.

Buying in good faith does not necessarily protect you from losing stolen property. If something you have bought turns out to be stolen, it may have to be returned to its rightful owner, leaving you to pursue the seller for your money.

The important thing is to check the trailer or horsebox in front of you - not just the details entered into a website.

The Short Version

• Read the identifiers directly from the plate and chassis, then compare them with the purchase paperwork and, for a horsebox, the original V5C. Never rely on the advert or a photograph.
• In normal domestic use a trailer has no DVLA record. Its number plate belongs to the tow vehicle, so vehicle checkers cannot help; you need its own VIN, serial or chassis number.
• Where an Ifor Williams plate shows a 17-character VIN, it starts SCK and its last six or seven digits are the serial number. Check the advertised age against the VIN with our free Ifor Williams age finder.
• Run a theft and finance check. For a trailer, TER charges £10 + VAT for theft and £30 + VAT for both, and Selectamark's Equipment Checker is free but theft-only and a separate database. For a horsebox, use a vehicle-history service that covers your type of vehicle.
• A V5C names the keeper, not the owner. Ask for the seller's own purchase receipt too.
• If details do not match, pause and get independent help before paying. If you suspect theft, keep the advert and messages and call 101, or 999 if a crime is in progress or someone is in danger.

Start With the Right Identification Numbers

The information you need depends on whether you are buying a towed horse trailer or a motorised horsebox.

For a horse trailer

You need the trailer's own VIN, chassis number or manufacturer's serial number. Look for these on its identification plate and chassis, following the manufacturer's guidance.

For a motorised horsebox

Ask for its registration number and vehicle identification number, usually called the VIN or chassis number. At the viewing, compare the physical identification numbers with the V5C registration document and any history report you obtain. GOV.UK's guidance on buying a vehicle recommends checking a used vehicle's identity against its documents before buying.

You cannot check a trailer with the DVLA or on GOV.UK

In normal domestic use a trailer has no registration of its own, so there is no DVLA record to look up. A trailer must display the registration of the vehicle towing it. Entering that number into a vehicle checker therefore checks the towing vehicle, not the trailer.

Trailers used only in the UK do not generally need to be registered. Some carry a registration because they have been registered through the GOV.UK scheme, which exists mainly for trailers taken abroad. That registration is not a theft check, and you should still inspect the physical identifiers on the trailer itself.

Check Who Is Selling It

Arrange a viewing in daylight and establish who you are buying from. For a private sale, meeting at the seller's home helps you confirm an address associated with the transaction. For a dealer, check the business independently rather than relying entirely on information in the advert. Citizens Advice recommends checking a trader's reputation and carrying out history checks regardless of who is selling.

Ask how long the seller has owned the trailer or horsebox, where they bought it and why they are selling. Request their purchase invoice or receipt, and check that it identifies the same trailer or vehicle.

A previous bill of sale is useful supporting evidence, but consider it alongside the other checks rather than treating one document as conclusive. Government buyer guidance specifically recommends asking for evidence of ownership, not simply accepting a registration certificate.

Where someone is selling on another person's behalf, establish who owns it and how the seller is authorised to complete the sale. Do not proceed while that remains unclear.

How to Check a Horse Trailer

Find the manufacturer's identification plate

Ask the seller to show you the trailer's identification plate and any corresponding markings on the chassis. Record the numbers directly from the trailer, then compare them with the purchase paperwork and the details used for your history check.

The location and format vary by manufacturer and model. For most makes the plate is on or near the drawbar, the A-frame at the front. If you cannot locate or read an identifier, contact the manufacturer or a trailer-identification specialist before proceeding. Do not guess a missing character or accept an unexplained discrepancy.

Checking an Ifor Williams trailer

Ifor Williams trailers are common on the UK second-hand market, and the manufacturer publishes detailed guidance on its identifiers, so it is worth knowing them in detail.

Every Ifor Williams trailer carries an identification plate, usually on the drawbar, although unbraked models and box vans have it elsewhere. Where the plate shows a 17-character VIN, it begins SCK and its last six or seven digits are the trailer's serial number. On Ifor Williams horse trailers the manufacturer says the serial number is also stamped into the top of the right-hand drawbar A-frame, so you can compare the plate against the stamping.

The tenth character of the VIN encodes the model year. Our free Ifor Williams trailer age finder decodes it, which lets you check that the age in the advert matches the age on the plate. A trailer advertised as newer than its VIN says is a reason to ask questions.

Many Ifor Williams trailers also have a separate chassis code cut into the side of the drawbar. This code is not simply another copy of the serial number: Ifor Williams can cross-reference it against its production records. Two different-looking codes are therefore not automatically evidence of a problem, but they should identify the same trailer when checked with the manufacturer.

Resolve missing or altered identification before buying

A missing plate does not, by itself, establish that a trailer is stolen. However, it leaves an important part of the identity check unresolved. Ifor Williams advises contacting its customer care team or The Equipment Register where identification is missing or further assistance is needed.

Treat unreadable markings, unexplained replacement plates or identifiers that do not correspond with the paperwork as reasons to pause. Ask for independent help establishing the trailer's identity before handing over money.

The same principle applies to an older trailer: age is not a reason to skip the identification check.

How to Check a Motorised Horsebox

Compare the DVLA details and test history

Use the free GOV.UK vehicle enquiry service to check the registration details against the seller's description. The service includes information such as the first registration date, year of manufacture, engine size, fuel type, weight and last V5C issue date.

Check the MOT or relevant annual test history too, and ask about anything that does not fit the information you have been given.

These are useful background checks, not stolen-vehicle or outstanding-finance checks. Do not mistake a matching registration record or a current test certificate for confirmation that the seller has the right to sell. The free DVLA enquiry service does not include theft or finance status among its listed results.

Inspect the original V5C

Ask to see the original V5C log book at the viewing, rather than relying on a photograph. Check its vehicle details against the horsebox and look for the "DVL" watermark described in GOV.UK's used-vehicle guidance.

A V5C is not proof of ownership. It records the registered keeper, which is why the seller's purchase documents and authority to sell need separate attention.

If the log book is missing, do not accept a promise that it will follow after payment. DVLA advises against buying a vehicle without a V5C.

Check the VIN on the horsebox itself

Compare the VIN on the horsebox with the V5C and your history report. Check it in more than one location where possible, using the chassis manufacturer's guidance to find it.

This matters because criminals can disguise a stolen vehicle using another vehicle's identity, known as cloning. Police guidance recommends checking more than one VIN marking, as well as the engine number, against the vehicle's documents.

For a converted horsebox, also distinguish the age of the chassis from the date of the conversion. A newer horsebox body can be built on an older vehicle, so ask for the conversion paperwork rather than assuming the advertised build year is the chassis year. Our complete horsebox buyers' guide covers this distinction and the wider physical inspection.

Choose the Right History Check

For a horse trailer

Use a service that can check the trailer through its own identifiers. The Equipment Register, commonly called TER, is one option to investigate for trailer theft and finance checks. Ifor Williams names TER as the register to approach where a trailer's identification is missing or a theft needs reporting, so it is a sensible starting point rather than the only one.

Before purchasing a report, confirm that the provider can check the trailer's make, age and identification format. Ask which theft and financial-interest records the report searches.

What a trailer check costs, and the free option

At the time of writing, TER offers two checks: a theft check at £10 plus VAT, and a theft-and-finance check at £30 plus VAT, with the finance element searched against the HPI database. You need the make and model, the serial number or ideally the full 17-digit VIN, and the road registration where one applies. TER aims to return a result within about half an hour during office hours.

The finance element is the one worth paying for. A trailer with outstanding finance is not stolen, but the lender may still have a claim on it, and a theft-only search will not tell you that.

A free option also exists. Selectamark's Equipment Checker lets you search a serial number against its database of items reported stolen at no charge. It checks theft only, and it is a separate database from TER, so a clear result on one is not a clear result on the other. Treat a free check as a first pass, not a substitute.

For a motorised horsebox

Choose a vehicle-history service that explicitly includes reported stolen status and outstanding finance. Confirm that it covers the particular type of horsebox you are buying, especially for larger vehicles.

Check the package contents before paying. Vehicle-history products can include different combinations of theft, finance, write-off and identity information; a basic lookup is not necessarily equivalent to a fuller report.

For a converted horsebox, ask the provider what its check covers and whether any separately financed body or conversion would fall within scope.

Read the result, and its limitations

Arrange your own check shortly before committing to the purchase, and retain the dated result. Do not rely solely on a report or screenshot supplied by the seller.

A result showing "not recorded as stolen" is not an unconditional guarantee. The report depends on the identity supplied, the records available and the provider's coverage. Any financial guarantee attached to a report also has conditions and exclusions, commonly including limitations around cloned vehicles and overseas history, and these are worth reading before you buy.

For an imported horsebox or trailer, specifically ask whether the check covers its history before arrival in the UK. TER, for example, states that its checks cover UK data only.

If a check is unavailable or incomplete, treat that part as unchecked, not clear. If finance is flagged, pause and establish the position with the checking provider and the relevant lender before proceeding. A finance entry and a theft record are different findings and need different explanations.

Five Questions Before You Pay a Deposit

Use these as a final check:

1. Seller. Have you established who owns the trailer or horsebox and who is authorised to sell it?
2. Identity. Have you read the identifiers from the trailer or vehicle itself and compared them with the paperwork?
3. History. Have you obtained an appropriate check and understood what it does, and does not, cover?
4. Discrepancies. Have missing documents, mismatched details and any flagged records been properly resolved?
5. Transaction. Have you agreed the terms in writing and requested a receipt identifying the seller, buyer, trailer or horsebox, price and date?

Keep the advert, messages, supporting documents and payment records. Receipts and other evidence of purchase can be important if you later need to pursue a refund for stolen goods.

Do not let pressure to secure a bargain replace the checks. If the seller will not allow reasonable enquiries, leave the purchase there.

What to Do if You Suspect a Trailer or Horsebox Is Stolen

Do not complete the purchase or try to investigate the seller yourself. Move somewhere safe and contact the police. Call 101 for a non-emergency, or 999 if a crime is in progress or someone is in immediate danger. Non-emergency reports can also be made online, and GOV.UK's report a crime guidance links the right route for where you are: Police.uk covers England, Wales and Northern Ireland, and Police Scotland handles reports in Scotland.

Preserve the advert, seller's contact details, messages and any identification numbers you have already obtained. Report your concerns privately to the advertising platform as well, rather than publishing accusations.

If you have already bought it, contact the police and follow their instructions. Do not sell it on or return it to the seller yourself. Citizens Advice recommends involving the police promptly when you believe you have bought stolen goods.

For advice about recovering your money, the relevant consumer services are Citizens Advice in England and Wales, Advice Direct Scotland in Scotland, and Consumerline in Northern Ireland.

If Your Own Trailer or Horsebox Has Been Stolen

Tell the police and your insurer promptly. For a trailer, provide its serial number, VIN and any chassis or drawbar code. Notify the manufacturer and any register on which it is recorded. Ifor Williams specifically recommends reporting stolen trailers to both the police and TER. Notifying a register or advertising platform does not replace a police report.

For a motorised horsebox, have the registration, make, model and colour ready, along with the VIN and photographs where available. Keep the crime reference number for your insurance claim.

If you are unsure what your policy covers in a theft, our guide to horsebox insurance explains the cover types and the conditions that can affect a claim.

Check the Condition as Well as the History

An identity or history check is only one part of buying. You still need to assess the floor, ramp, chassis, brakes and suitability for your horses.

Resolve any doubts before paying, not after collecting your new trailer or horsebox.

Other Reading on Buying Safely

• Ifor Williams trailer age finder - decode the manufacture year from the VIN and check it against the advert
• Buying a horse trailer in the UK - prices, brands and what to look for on a used trailer
• The complete horsebox buyers' guide - the full 25-point inspection checklist, including the paperwork checks
• Buying a repossessed horsebox - where finance-recovered lorries come from and how to buy one safely
• Understanding horsebox payloads - the weight and plating checks that sit alongside the identity checks
• Horsebox insurance - what to arrange before you drive your purchase home

You can also browse horse trailers for sale on Moving Manes and used horseboxes for sale to compare what is currently on the market.

Disclaimer: This guide is intended for informational purposes only and does not constitute legal advice. Consumer protections, reporting procedures, and the prices and scope of any commercial history check vary and change; always read the specific terms of any check or sale, and seek independent advice where ownership or finance is unclear.