Limitation Act, 1963
18. Effect of acknowledgment in writing –
(1) Where before the expiration of the prescribed period for a suit or application in respect or 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 derived 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 thee 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 ( 1 of 1872), oral evidence of its contents 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 refusal to pay, deliver, perform or permit to enjoy, or is coupled with a claim to set-off, or is addressed to a person other than a person entitled to the property or ornight;
NOTES - It is not necessary that an acknowledgment within Section 18 must contain a promise pay or should amount to a promise to pay. (Subbarsadya v.Narashimha, AIR 1936 Mad.939)
The above section corresponds to S.19 of the old Act and makes slight changes.