Negotiable Instruments Act, 1881 — section 51

51. Who may negotiate. Every sole maker, drawer, payee or indorsee, or all of several joint makers, drawers, payees or indorsees, of a negotiable instrument may, if the negotiability of such instrument has not been restricted or excluded as mentioned in section 50, indorse and negotiate the same. Explanation.— Nothing in this section enables a maker or drawer to indorse or negotiate an instrument, unless he is in lawful possession or is holder thereof; or enables a payee or indorsee to indorse or negotiate an instrument, unless he is holder thereof. Illustration A bill is drawn payable to A or order. A indorses it to B, the indorsement not containing the words “or order” or any equivalent words. B may negotiate the instrument.