law: Indian Post Office Act, 1898 
  30. Insurance of postal articles 
  The Central Government
  
  may, by notification in the Official Gazette, direct-
  (a) that any postal
  
  article may, subject to the other provisions of this Act, be insured at the
  
  post office at which it is posted, against the risk of loss or damage in course
  
  of transmission by post, and that a receipt therefor shall be granted to the
  
  person posting it; and
  (b) that, in addition
  
  to any postage and fees for registration chargeable under this Act, such
  
  further fee as may be fixed by the notification shall be paid on account of the
  
  insurance of postal articles.