B/L:
BILL OF LOADING bill of lading is a document of title of goods.
D/O:
DELIVERY ORDER bills of lading, port of destination of the goods is required for the certificate, not transferable.
After the cargo on board, issued by the shipping company B / L to SHIPPER, SHIPPER will be B / L transferred CONSIGNEE, the goods arrive at the port, CONSIGNEE with B / L to the shipping company in exchange for D / O, with D / O to the port of delivery.
Prior to the extraction of the two goods and only one left in the hands of the owner, but D / O is no longer the property right certificate, the owner to receive D / O, the description of the shipping companies have been put to the owner of the goods.