law: Copyright Act, 1957 
  60. Remedy in the case of groundless threat of
  
  legal proceedings – 
  Where any person claiming to be the owner of
  
  copyright in any work, by circulars, advertisements or otherwise, threatens any
  
  other person with any legal proceedings or liability in respect of an alleged
  
  infringement of the copyright, any person aggrieved thereby may,
  
  notwithstanding anything contained [(Note: Subs. for "in Section 42 of
  
  the Specific Relief Act,1877" by Act 23 of 1983, S.21 (w.e.f. 9-8-1984)) in
  
  section 34 of the Specific Relief Act,, 1963 (47 of 1963)] institute a
  
  declaratory suit that the alleged infringement to which the threats related was
  
  not in fact an infringement of any legal rights of the person making such
  
  threats and may in any such suit- 
  a. obtain an
  
  injunction against the continuance of such threats, and
  b. recover such
  
  damages, if any, as he has sustained by reason of such threats:
  Provided  that this section shall not apply if
  
  the person making such threats, with due diligence, commences and prosecutes an
  
  action of infringement of the copyright claimed by him.