提单是指用以证明海上货物运输合同和货物已经由承运人接收或者装船，以及承运人保证据以交付货物的单证①提单具有货物收据、物权凭证和运输合同的书面证明等作用，它在国际货物运输和货物买卖中有着十分重要的作用。提单有三个基本的法律功能；运输合同的证明，承运人接收管 B / L is to prove that the contract of carriage of goods by sea and the goods have been received by the carrier or shipment, and the carrier promised to deliver the goods documents ① bill of lading with a receipt of goods, documentary evidence of ownership and contract of carriage of proof, etc. In the international transport of goods and the sale of goods has a very important role. The bill of lading has three basic legal functions; the proof of the contract of carriage, the carrier’s receiver