Guides / UK trailer registration · Updated 19 October 2026

UK trailer registration certificate: DVLA registration for trips abroad

Towing a trailer to Poland, France or Germany? Commercial trailers over 750kg and all trailers over 3,500kg need DVLA trailer registration and a UK trailer registration certificate before they leave, and GOV.UK now tells everyone with a trailer over 750kg to register.

A UK trailer registration certificate is the document the DVLA issues when you register a trailer to take it abroad. It is tied to the 1968 Convention on Road Traffic: the registration rule applies to journeys into countries that are contracting parties to it, and a registered trailer carries its own plate, separate from the towing vehicle. If a trailer never leaves the UK, GOV.UK says it does not need to be registered under this scheme. If it crosses the Channel to Poland, France or Germany, it very likely does. This guide sets out who must register, which countries are covered, how DVLA trailer registration works and what the plate must look like.

Which trailers must be registered

The rule is in regulation 5 of the Trailer Registration Regulations 2018, in force since 28 March 2019. It is an offence to keep or use an unregistered trailer on a road when it is being used on a journey that will involve entering a country outside the UK that is a contracting party to the 1968 Convention. The regulation then excludes:

• trailers with a permissible maximum mass of 750kg or less;
• trailers with a permissible maximum mass of 3,500kg or less that are not being used on that journey primarily for the commercial transport of goods or passengers' belongings, or in connection with another paid occupation;
• trailers kept by someone who is not resident in the UK, not a company registered under the Companies Act 2006 and not the holder of a valid operator's licence.

Put simply, the law catches commercial trailers over 750kg and all trailers over 3,500kg. The current GOV.UK guidance, updated in August 2025, states the rule more broadly: you must register all trailers over 750kg to drive to or through most countries in Europe. If you are not sure which side of the line your trailer falls on, the GOV.UK wording is the cautious reading.

The regulation also gives two defences: that you could not reasonably have known the trailer would be used that way, or that you reasonably believed it was registered.

Where registration applies

GOV.UK lists 41 countries where you must have your trailer registered to travel:

Albania, Andorra, Armenia, Austria, Azerbaijan, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hungary, Italy, Kazakhstan, Latvia, Lithuania, Luxembourg, Macedonia, Moldova, Monaco, Montenegro, Netherlands, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Sweden, Switzerland and Ukraine.

You do not need to register trailers used only in the UK, or only for journeys between the UK and Ireland. Trailers used in Cyprus, Malta or Spain are also outside the requirement, but GOV.UK adds an important catch: if you tow through any country where the rules apply to reach Cyprus, Malta or Spain, you must register. So a trailer in scope that runs from Dover to Spain through France needs to be registered.

How DVLA trailer registration works

Registration is done online through the DVLA's "Register your trailer to take it abroad" service. You set up an account, which can hold one trailer or a fleet, and use it later to update details when you sell or scrap a trailer or change your name or address. Before you start, GOV.UK says to have:

• the trailer manufacturer's name;
• the trailer type, for example box, container, horsebox or caravan;
• the vehicle identification number (usually 17 characters) or chassis number, normally on a metal plate or stamped into the chassis;
• the gross and unladen weights;
• an email address and a debit or credit card for the DVLA fee;
• a Government Gateway user ID and password, which you can create during the process.

Abnormal load trailers need one more document. GOV.UK says you must also get a keeper's certificate and keep it in the vehicle to show at border crossings, and it warns that some countries measure abnormal loads differently from the UK. Our guide to lorry weight and dimension limits covers when a load counts as abnormal in Great Britain.

The UK trailer registration certificate on the road

Once registered, a trailer on an international journey must display its own registration plate and carry the trailer registration certificate so it can be shown to a foreign authority on request. GOV.UK's guidance on vehicle documents for international road haulage repeats that you need to carry the certificate when you travel abroad, and adds that where you need a green card for insurance, you need one for the towing vehicle and one for the trailer.

The certificate sits alongside, not instead of, the operator paperwork. If you run lorries abroad for hire or reward, our guide to the standard international operator licence covers the licence side.

Trailer plates: format and where they go

DVLA's guidance INF291 sets out the plate rules:

DVLA warns that anyone whose number plate does not display the registration number correctly could be fined up to £1,000. A UK sticker may be required in some countries and is recommended, but it must be separate from the trailer plate.

Selling, scrapping or stopping foreign trips

When a trailer is sold, transferred, scrapped or exported, DVLA asks you to remove it from your trailer account with the disposal date, take the registration plate off, and tell the new keeper the registration number in case they want to register it for international use. If you simply stop taking a trailer abroad, you can remove it from your account and should then remove its plate.

A pre-departure checklist

• Check the permissible maximum mass and whether the trip is commercial.
• Check the route: any listed country on the way means registration, even if the destination is Spain.
• Register online and fit the correct plate before departure.
• Carry the trailer registration certificate, and a keeper's certificate for an abnormal load trailer.
• Arrange green cards for both the towing vehicle and the trailer where needed.
• Keep the customs documents for the load separate; trailer registration does not replace them.

Easy Clearance, whose customers move goods and belongings between the UK and Poland, also has a page on trailer registration with the DVLA for trailers coming from Europe.

Related guides

• Standard international operator licence: who needs one for UK–EU work

• Travelling between the UK and Poland with personal medicines

• Lorry weight and dimension limits in Great Britain for hauliers

Sources

• Check if you need to register a trailer before towing it abroad (GOV.UK)
• Register your trailer to take it abroad (GOV.UK)
• Trailer registration numbers and number plates, INF291 (GOV.UK)
• International road haulage: HGV and trailer documents (GOV.UK)
• The Trailer Registration Regulations 2018, regulation 5 (legislation.gov.uk)

General information, not legal, tax or customs advice. Rules change; confirm current requirements on gov.uk or with a registered agent before you ship.