law: Negotiable Instruments Act, 1881 
  46. Delivery 
  The making, acceptance or endorsement of a promissory note, bill
  
  of exchange or cheque is completed by delivery, actual or constructive.
  As between parties standing in immediate relation, delivery to
  
  be effectual must be made by the party making, accepting or endorsing the
  
  instrument, or by a person authorized by him in that behalf.
  As between such parties and any holder of the instrument other
  
  than a holder in due course, it may be shown that the instrument was delivered
  
  conditionally or for a special purpose only, and not for the purpose of
  
  transferring absolutely the property therein.
  A promissory note, bill of exchange or cheque payable to bearer
  
  is negotiable by the delivery thereof.
  A promissory note, bill of exchange or cheque payable to order is
  
  negotiable by the holder by endorsement and delivery thereof.