The purpose of the CISG is to provide a modern, uniform and fair regime for contracts for the international sale of goods. In their day-to-day activities, traders and business people around.An international sales contract is an agreement between a buyer and a seller that identifies the parties in the transaction, the goods or services being sold. Sale of Goods (Convention) was adopted in Vienna on April 11, 1980. t. A contract is an agreement that specifies certain legally enforceable rights and obligations pertaining to two or more parties. Exports, along with imports, make up international trade. (a) Parties to international business transactions must act in accordance with good faith and fair dealing in international trade. The International Sale Contract is the most used among those governing trade relations between companies in different countries. A concession agreement is a contract between a company and a government, or other property owner, to operate a business in a particular location. Increase the number of small businesses exploring significant new trade opportunities.