Information Technology Act, 2000
12. Acknowledge of receipt.-
(1) Where the originator has not agreed with the addressee that the acknowledgement of receipt of electronic record be given in a particular form or by a particular method, an acknowledgement may be given by-
(a) any communication by the addressee, automated or otherwise; or
(b) any conduct of the addressee, sufficient to indicate to the originator that the electronic record has been received.
Where the originator has stipulated that the electronic record shall be binding only on receipt of an acknowledgement of such electronic record by him, then, unless acknowledgement has been so received, the electronic record shall be deemed to have been never sent by the originator.
Where the originator has not stipulated that the electronic record shall be binding only on receipt of such acknowledgment, and the acknowledgement has not been received by the originator within the time specified or agreed or, if no time has been specified or agreed to within a reasonable time, then, the originator may give notice to the addressee stating that no acknowledgement has been received by him and specifying a reasonable time by which he acknowledgement must be received by him and if no acknowledgement is received within the aforesaid time limit he may after giving notice to the addressee, treat the electronic record as tough it has never been sent.