TIR CARNET is an international transport warranty document. It covers payable customs duties up to 50 000 US dollars. The document is issued by virtue of the international TIR convention under the guarantee provided by the duly authorized organizations. The international organisation is IRU – the International Road Union and for Bulgaraia it is AEBTRI – Association of the Bulgarian Enterprises for International Road Transport and the Roads.
In practice, the TIR carnet is an internationally accepted document for transit of goods. It is under the coverage of the guarantee extended by the issuing organization. According to this convention, goods are carried in vehicles and containers on which customs stamps and seals have been put. It is necessary that said vehicles should be approved according to the methods set out in the Convention first and to hold a valid Certificate of Customs Compliance.