law: Indian Post Office Act, 1898 
  69. Penalty for unlawfully diverting letters 
  Whoever, not being an
  
  officer of the Post Office, willfully and maliciously, with intent to injure
  
  any person, either opens or causes to be opened any letter which ought to have
  
  been delivered, or does any act whereby the due delivery of a letter to any
  
  person is prevented or impeded, shall be punishable with imprisonment for a
  
  term which may extend to six months, or with fine which may extend to five
  
  hundred rupees, or with both :
  Provided that nothing
  
  in this section shall apply to a person who does any act to which the section
  
  applies, if he is a parent, or in the position of a parent or guardian, of the
  
  addressee, and the addressee is a minor or a ward.
  General