law: Limitation Act, 1963 
  17. Effect of fraud or mistake – 
  (1) Where, in the case of any suit or application for which a
  
  period of limitation is prescribed by this Act- 
  a. the suit or
  
  application is based upon the fraud of the defendant or respondent or his
  
  agent; or
  b. the knowledge of
  
  the right or title on which a suit or application is founded is concealed by
  
  the fraud of any such person as aforesaid; or 
  
  
  c. the suit or
  
  application is for relief from the consequences of a mistake; or 
  
  
  d. where any document
  
  necessary to establish the right of the plaintiff or applicant has been
  
  fraudulently concealed from him; 
  
  
  the period of limitation shall not begin to run until the
  
  plaintiff or applicant has discovered the fraud or the mistake or could, with
  
  reasonable diligence, has discovered it, or in the case of concealed document,
  
  until the plaintiff or the applicant first had the means of producing the
  
  concealed document or compelling its production:
  Provided  that nothing in this section shall enable any
  
  suit to be instituted or application to be made to recover or enforce any
  
  charge against or set aside any transaction affecting, any property which- 
  i. in the case of fraud, has been purchased
  
  for valuable consideration by a person who was not a party to the fraud and did
  
  not at the time of the purchase know, or have reason to believe, that any fraud
  
  had been committed, or
  ii. in the case of mistake, has been purchased
  
  for valuable consideration subsequently to the transaction in which the mistake
  
  was made, by a person who did not know, or have reason to believe, that the
  
  mistake had been made, or 
  
  
  iii. in the case of a concealed document, has
  
  been purchased for valuable consideration by a person who was not a party to
  
  the concealment and, did not at the time of purchase know, or have reason to
  
  believe, that the document had been concealed. 
  
  
  (2) Where a judgment-debtor has, by fraud or force, prevented
  
  the execution of a decree or order within the period of limitation, the court
  
  may, on the application of the judgment-creditor made after the expiry of the
  
  said period extend the period for execution of the decree or order:
  Provided  that such application is made within one year
  
  from the date of the discovery of the fraud or the cessation of force, as the
  
  case may be.