Or foreign trade is a set of operations ranging from the purchase and sale between merchants of the countries.This transaction is due to its broadness of side-effective and important measures such as packaging, insurance, transport of goods and delivery and transformation. Each of these things came under the title in this book. The divisions between nations have a long history, and because it is done to meet the needs of people in societies, and in accordance with the diversity of their tastes and products, it is inevitable with the social life of the people of the world. The basis of international trade is the communication that the seller and buyer make together. The most prominent sign of this connection and determining the policy of the parties is the terms and cases that are included in contracts signed by merchants, and the common norm and method between businesses and related institutions. International trade and export are special terms.