law: Indian Post Office Act, 1898 
  47. Recovery of money order paid to the wrong person 
  If any person, without
  
  reasonable excuse, the burden of proving which shall lie on him, neglects or
  
  refuses to refund-
  (a) any amount paid to
  
  him in respect of a money order by an officer of the Post Office in excess of
  
  what ought to have been paid to him in. respect thereof, or
  (b) the amount of a
  
  money order paid by an officer of the Post Office to him instead of to some
  
  other person to whom it ought to have been paid, such amount shall be
  
  recoverable by an officer of the Post Office authorized by the Post Master
  
  General in this behalf from the person so neglecting or refusing as if it were
  
  an arrear of land revenue due from him.45