Explanation:

Section 18. Effect of acknowledgement in writing. (1) Where, before the expiration of the prescribed period for a suit or application in respect of any property or right, an acknowledgement 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 acknowledgement was so signed. (2) Where the writing containing the acknowledgement 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, oral evidence of its contents shall not be received.