law: Sale of Goods Act, 1930
  53. Effect of sub-sale or pledge by buyer
  (1) Subject to the provisions of this Act, the unpaid seller's
  
  right of lien or stoppage in transit is not affected by any sale or other
  
  disposition of the goods which the buyer may have made, unless the seller has
  
  assented thereto:
  PROVIDED that where a document of title to goods has
  
  been issued or lawfully transferred to any person as buyer or owner of the
  
  goods, and that person transfers the document to a person who takes the
  
  document in good faith and for consideration, then, if such last mentioned
  
  transfer was by way of sale, the unpaid seller's right of lien or stoppage in
  
  transit is defeated, and, if such last mentioned transfer was by way of pledge
  
  or other disposition for value, the unpaid seller's right of lien or stoppage
  
  in transit can only be exercised subject to the rights of the transferee.
  (2) Where the transfer is by way of pledge, the unpaid seller
  
  may require the pledge to have the amount secured by the pledge satisfied in
  
  the first instance, as far as possible, out of any other goods or securities of
  
  the buyer in the hands of the pledge and available against the buyer.