An undischarged ATA Carnet means the paperwork lacks confirmation that the equipment left the UK or returned to Poland. The British administration can claim duty and VAT through the chain of chambers, and the holder normally has six months to prove the goods came back. Substitute evidence usually saves the case, at the cost of a regularisation fee and paperwork.
What is at stake when an ATA Carnet is not discharged?
The mechanism is delayed, which makes it treacherous. Seeing no confirmation of re-export, the British authorities assume the equipment stayed in the UK, which means import charges: duty and VAT on the values from the carnet's general list. The claim goes to the issuing chamber, in Poland the Polish Chamber of Commerce, which turns to the holder. The money is genuinely secured: when the carnet was issued you lodged security or bought carnet insurance, and that is the source the charges will be taken from if evidence is missing. On top of that comes a regularisation fee for closing the case with substitute evidence, its level depending on the country and the chamber, plus the risk of friction with your next carnets.
Where do undischarged carnets come from?
Almost never from bad faith. The usual scenarios: the driver left the UK without the exit voucher stamped, because nobody stopped the vehicle and nobody knew you must report yourself; the fair ended at a weekend with the customs desk out of reach; the carnet travelled back to Poland in a crate with the equipment instead of in the cab; the Polish re-import voucher was skipped at unloading. The correct stamp sequence is described in ATA Carnet: return and discharge. On transports with us, stamping is policed by the driver and the dispatcher at every border, precisely because we know how gaps end.
How do you fix an undischarged carnet step by step?
- Do not wait for the claim: the moment you spot a missing stamp, start collecting evidence of the equipment's return.
- Gather the carriage documents: the CMR with dates, crossing confirmations, unloading records in Poland.
- Apply for an official confirmation of where the goods are: in the UK the equivalent is a certificate of location issued by HMRC when goods returned to Britain without a stamp; for a Polish holder the analogous confirmation is arranged on the side where the goods sit.
- Send the evidence to the chamber handling the case within the deadline in the claim letter; the standard window is 6 months from the claim.
- Pay the regularisation fee if the chamber charges one, and keep the confirmation that the file is closed.
The sooner you move, the better the odds the case ends on paperwork rather than a payout from the security.
How do you prevent the problem on future trips?
Three rules close the subject. First, the carnet always travels in the cab, never in a crate. Second, every border means a stamp: the driver carries a list of points where he must report, including when nobody stops him. Third, after the return the carnet goes straight back to the team that issued it, with all vouchers for review. On fair transports organised with us these three points are part of the procedure, alongside build-up windows and the logistics described in our guide to exhibit transport to trade fairs.
Who is formally responsible for discharging the carnet?
Responsibility towards the chamber and the customs administration rests with the carnet holder, the company the document was issued to. It does not pass to the carrier or the fair agency, even if they physically carried the document across borders. The sensible division of roles therefore looks like this: the holder names a person who knows the stamp sequence and reviews the carnet after each stage, and the carrier receives clear instructions on where and when to report to customs. With us those instructions are part of the departure documents and the dispatcher ticks off the stamps along the route, because practice shows a review after the fact always turns out worse than policing as you go. If a carnet serves several trips a year, review the vouchers after every return and clear up gaps immediately, while evidence of the journey is still easy to obtain.
Sources
- GOV.UK: ATA Carnet technical handbook (accessed 17 Aug 2026)
- London Chamber of Commerce and Industry: ATA Carnet claims learning module (accessed 17 Aug 2026)
Received a carnet claim, or spotted a missing stamp after a fair? Write via our contact form: we will help assemble carriage evidence from our routes and close the file.
