Section 48 of The Negotiable Instruments Act : Negotiation by indorsement.

Negotiation by indorsement. Negotiable Instruments Act 1881
Subject to the provisions of section 58, a promissory note, bill of exchange or cheque 1[payable to order], is negotiable by the holder by indorsement and delivery thereof1. Subs. by Act 8 of 1919, s. 4, for payable to the order of a specified person, or to a specified person or order.