law: Indian Post Office Act, 1898 
  18. Redelivery to sender of postal article in course of
  
  transmission by post
  (1) The Central
  
  Government may, by rule, provide for the redelivery to the sender, without
  
  reference to the consent of the addressee and subject to such conditions (if
  
  any) as may be deemed fit, of any postal article in course of transmission by
  
  post.
  (2) Save as provided
  
  by any rules that may be made under sub-section (1), the sender shall not be
  
  entitled to recall a postal article in coarse of transmission by post.