law: Special Marriage Act, 1954 
  13. Certificate of marriage
  (1) When the marriage
  
  has been solemnized, the Marriage Officer shall enter a certificate thereof in
  
  the form specified in the Fourth Schedule in a book to be kept by him for that
  
  purpose and to be called the Marriage Certificate Book and such certificate
  
  shall be signed by the parties to the marriage and the three witnesses.
  (2) On a certificate
  
  being entered in the Marriage Certificate Book by the Marriage Officer, the
  
  Certificate shall be deemed to be conclusive evidence of the fact that a
  
  marriage under this Act has been solemnized and that all formalities respecting
  
  the signatures of witnesses have been complied with.