Explanation:

Section 2(4) of Sale of Goods Act –

2. Definitions. (4) "document of title to goods" includes bill of lading dock-warrant, warehouse keeper's certificate, wharfingers' certificate, railway receipt, multimodal transport document, warrant or order for the delivery of goods and any other document used in the ordinary course of business as proof of the possession or control of goods or authorizing or purporting to authorize, either by endorsement or by delivery, the possessor of the document to transfer or receive goods thereby represented;