law: Negotiable Instruments Act, 1881 
  121. Estoppel against denying capacity of payee to endorse
  
   
  No maker of a promissory note, and no acceptor of a bill of
  
  exchange 32[payable to order] shall, in suit thereon by a holder in due course,
  
  be permitted to deny the payee's capacity, at the rate of the note or bill, to
  
  endorse the same.