A team flies to a trade fair with a demonstration rig in three cases, and customs at the destination wants duty and import VAT on the full declared value of equipment that is leaving again in nine days. Paying and reclaiming is rarely a real option, because most refund routes do not exist for goods that were never sold. Temporary admission is the procedure that suspends the charge instead of collecting it and giving it back.
The ATA Carnet is an international customs document operating under the Istanbul Convention, issued by a national guaranteeing chamber and valid for twelve months. It covers three categories: commercial samples, goods for exhibitions and fairs, and professional equipment. One carnet can serve several countries and several trips within its validity. It does not cover consumables, giveaways, goods sent for processing or repair, or anything intended to be sold at the destination.
The document is a set of coloured vouchers and counterfoils. Yellow sheets handle exportation from and re-importation into the home country, white sheets handle importation into and re-exportation from each country visited, and blue sheets cover transit. At every movement customs detaches a voucher and stamps the matching counterfoil left in the book. The counterfoils are the audit trail, and a missing re-export stamp is the most common and most expensive failure of all.
That failure carries a price, because a carnet is a guarantee rather than a permit. The issuing chamber holds security from the holder, in the form of a bond, a bank guarantee or a cash deposit, sized against the duty and tax the visited country could claim. Where a re-export cannot be proven, the foreign authority claims against the guaranteeing chain, the chain claims against the issuing chamber, and the chamber claims against your security.
Not every movement suits a carnet. Where the destination sits outside the scheme, the national temporary-admission procedure applies instead, against a local guarantee or a deposit, and vehicles crossing under their own power often need a CPD carnet. In the EU, temporary admission runs under the Union Customs Code with total or partial relief, a guarantee, and a normal maximum of twenty-four months, on condition the goods return in the same state.
Three neighbouring regimes are regularly confused with it. Inward processing covers goods entering to be repaired, tested or worked on before re-export. Outward processing covers the same movement in the opposite direction. Returned-goods relief covers goods that were exported permanently and have come back unaltered inside the permitted period. Choosing the wrong one is not a formality, because each carries its own authorisation, time limit, guarantee and evidence for discharge.
The General List is where preparation earns its keep. Every item needs a description matching what is physically in the case, a serial number where one exists, a weight and a realistic value. The list cannot be extended after issue, so a forgotten laptop or spare part can only be covered by a replacement carnet, never added at the airport. Keep numbering and descriptions consistent so an officer can reconcile a case to the page quickly.
Most incidents have a defined fix when handled at the time. Partial re-export is allowed, provided the vouchers record what actually left the country. Goods sold at a show can be entered for home use and the duty paid, which is an option rather than a breach once it has been declared. Broken equipment needs customs-authorised destruction or abandonment. An expiring carnet with goods still abroad needs a replacement issued before expiry, not afterwards.
Two practical points close the gap between the paperwork and the departure. The carnet must travel with the goods and be presented by someone who knows to lodge it, because a hand-carried case waved through the green channel has been imported permanently. And a carnet suspends duty, not dangerous-goods rules, so lithium batteries inside test equipment still follow the IATA requirements. Send us the equipment list, the countries and the dates before booking.
