law: Registration Act, 1908
  73. Application to Registrar where Sub-Registrar refuses
  
  to register on ground of denial of execution
  (1) When a Sub-Registrar has refused to register a document on
  
  the ground that any person by whom it purports to be executed, or his
  
  representative or assign, denies its execution, any person claiming under such
  
  document, or his representative, assignee or agent authorized as aforesaid,
  
  may, within thirty days after the making of the order of refusal, apply to the
  
  Registrar to whom such Sub-Registrar is subordinate in order to establish his
  
  right to have the document registered.
  (2) Such application shall be in writing and shall be
  
  accompanied by a copy of the reasons recorded under section 71, and the
  
  statements in the application shall be verified by the applicant in manner
  
  required by law for the verification of plaints.