law: Indian Post Office Act, 1898 
  68. Penalty for retaining postal articles wrongly
  
  delivered or mail bags 
  
  Whoever fraudulently
  
  retains, or willfully secretes or makes away with, or keeps or detains, or when
  
  required by an officer of the Post Office, neglects or refuses to deliver up,
  
  any postal article in course of transmission by post which ought to have been
  
  delivered to any other person, or a mail bag containing a postal article, shall
  
  be punishable with imprisonment for a term which may extend to two years, and
  
  shall also be punishable with fine.