law: Prisoners Act, 1900
  4. Officers in charge of prisons to return writs, etc.,
  
  after execution of discharge
  The officer in charge of a prison shall forthwith, after the
  
  execution of very such writ, under or warrant as aforesaid other than a warrant
  
  of commitment for the trial, or after the discharge of the person committed
  
  thereby, return such writ, order or warrant to the Court by which the same was
  
  issued or made, together with a certificate, endorsed thereon and signed by
  
  him, showing how the charged has been executed, or why the person committed
  
  thereby has been discharged from custody before the execution thereof.