Indian Stamp Act, 1899
38. Instruments impounded how dealt with
(1) Where the person impounding an instrument under section 33 has by law or consent of parties authority to receive evidence and admits, such instrument in evidence upon payment of a penalty as provided by section 35 or of duty as provided by section 37, he shall send to the Collector an authenticated copy of such instrument, together with a certificate in writing, stating the amount of duty and penalty levied in respect thereof, and shall send such amount to the Collector, or to such person as he may appoint in this behalf.
(2) In every other case, the person so impounding an instrument shall send it in original to the Collector.