信用证是银行应国际货物买卖中买方的请求，开给卖方的一种在一定条件下保证付款的凭证。在国际货物买卖中，卖方最担心的是发运了货物却收不到价款；买方最担心的则是付出了货款而收不到货物。这种买卖双方互不信任的矛盾，仅靠他们自己是解决不了的，这是因为他们的营业地分 Letter of credit is the bank should be the buyer of the international sale of goods at the request of the seller to open under certain conditions to ensure payment of the voucher. In the international sale of goods, the seller is most worried about the delivery of the goods are not received the price; the buyer is most worried about payment of goods and not receive the goods. This conflict between buyers and sellers do not trust each other alone can not be resolved, it is because of their business