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Using your carnet at UK borders

A carnet only protects you if customs sees it at the right moments. For a simple round trip (UK to the EU and back) there are four customs touchpoints, and every one of them is your job to chase. No officer will come looking for you. This page walks through the lifecycle, then covers transit, digital carnets and longer stays.

The touchpoints, in order

1. UK export validation

You must show the carnet to customs when the goods leave the UK. The officer certifies the green cover, keeps the yellow export voucher and stamps the matching counterfoil. The stamped counterfoil stays in your booklet; that's your proof the goods left. At airports this happens before check-in; by road it happens at an inland border facility. Exact locations are in the airports guide and the Dover & Eurotunnel guide.

2. Import stamp at first EU entry

On arrival, customs keeps the white import voucher and stamps the counterfoil. For the EU this happens once, at your first point of entry, and covers all 27 member states. A stamp in Calais is just as good for a demo in Vienna as one at the Austrian border. You don't re-validate when moving between member states.

3. Re-export stamp when leaving the EU

Leaving the EU, get the white re-export voucher processed. This is the stamp people forget, because nobody stops you on the way out. An unstamped re-export is the classic trigger for a duty claim later, so seek out the customs desk actively.

4. UK re-import: box F

Coming home, you must complete box F on the yellow re-import voucher when you show the carnet and goods to customs at the port or airport of arrival. The officer keeps the voucher and stamps the counterfoil. Don't skip this one when you're tired after the trip; it's your last line of defence if a foreign administration later claims the goods never left.

5. Afterwards: keep the paperwork

gov.uk requires you to keep paper carnets for 12 months after they expire. Foreign claims can arrive late, and the stamped counterfoils are your evidence.

Transit: crossing countries en route

Where goods cross a country on the way to somewhere else, blue transit vouchers are used: officials keep the blue voucher and complete the counterfoil. Driving through the EU to a third country means opening transit at the first EU border and discharging it where you exit.

The digital carnet at the border

Carnets issued from 1 June 2026 for the UK, EU, Norway and Switzerland are digital. The mechanics:

Longer stays: replacement carnets

A carnet is valid 12 months and can't be extended. If the goods must stay abroad longer, a replacement carnet arranged before expiry is the route, where the destination accepts it. Per LCCI, India, Japan, Morocco and Taiwan do not allow replacement carnets, and the issuing manual adds that the USA accepts neither replacement carnets nor transits (blue vouchers). Check with your chamber before promising a customer a longer loan.

Pre-trip checklist

  1. Itinerary on the carnet matches the actual route, with spare visits and transits for EU trips.
  2. Stamping location and hours checked for both directions - airports, Dover/Eurotunnel.
  3. Digital carnet: travel created in the app, phone charged, route confirmed digital-ready with your chamber.
  4. At every border: voucher taken, counterfoil stamped (or QR scanned and synced). Check before moving on.
  5. Calendar entries: any re-export deadline set by destination customs, carnet expiry, and the 12-month record-keeping period.

Something already went wrong? The UK problem playbooks cover missed stamps, lost carnets and claim letters. And the common mistakes page is worth five minutes before your first trip.

Sources

Every factual claim on this page comes from the sources below, checked on the "last reviewed" date in the footer. Official resources are linked in whatever language they are published in.