law: Trade Marks Act, 1999  
  142. Groundless threats of legal proceedings.- 
  (1) Where a person, by means of circulars,
  
  advertisements or otherwise, threatens a person with an action or proceeding
  
  for infringement of trade mark which is registered, or alleged by the
  
  first-mentioned person to be registered, or with some other like proceeding, a
  
  person aggrieved may, whether the person making the threats is or is not the
  
  registered proprietor or the registered user of the trade mark, bring a suit
  
  against the first-mentioned person and may obtain a declaration to the effect
  
  that the threats are unjustifiable, and an injunction against the continuance
  
  of the threats and may recover such damages (if any) as he has sustained,
  
  unless the first-mentioned person satisfies the court that the trade mark is
  
  registered and that the acts in respect of which the proceedings were
  
  threatened, constitute, or if done, would constitute, an infringement of the
  
  trade mark.
  (2) That last proceeding sub-section does not
  
  apply if the registered proprietor of the trade mark, or a registered user
  
  acting in pursuance of sub-section (1) of section 52 with due diligence
  
  commences and prosecutes an action against the person threatened for
  
  infringement of the trade mark.
  (3) Nothing in this section shall render a
  
  legal practitioner or a registered trade marks agent liable to an action under
  
  this section in respect of an act done by him in his professional capacity on
  
  behalf of a client.
  (4) A suit under sub-section (1) shall not be
  
  instituted in any court inferior to a District Court.