law: Court Fees Act, 1850 
  18.Effect of acknowledgment in writing .- 
  (1) Where, before the expiration of the prescribed period for a
  
  suit or application in respect of any property or right, an acknowledgment of
  
  liability in respect of such property or right has been made in writing signed
  
  by the party against whom such property or right is claimed, or by any person
  
  through whom he derives his title or liability, a fresh period of limitation
  
  shall be computed from the time when the acknowledgment was so signed.
  (2) Where the writing containing the acknowledgment is undated,
  
  oral evidence may be given of the time when it was signed; but subject to the
  
  provisions of the Indian Evidence Act, 1872, (1 of 1872) oral evidence of its
  
  contends shall not be received.
  Explanation.--  For the purposes of this section,--
  (a) an acknowledgment may be sufficient though it omits to
  
  specify the exact nature of the property or right, or avers that the time for payment,
  
  delivery, performance or enjoyment has not yet come or is accompanied by a
  
  refusal to pay, deliver, perform or permit to enjoy, or is coupled with a claim
  
  to setoff, or is addressed to a person other than a person entitled to the
  
  property or right,
  (b) the word "signed" means signed either personally
  
  or by an agent duly authorized in this behalf, and
  (c) an application for the execution of a decree or order shall
  
  not be deemed to be an application in respect of any property or right.