A proposal may be revoked at any time before the communication of its acceptance is complete as against the proposer, but not afterwards.
An acceptance may be revoked at any time before the communication of the acceptance is complete as against the acceptor, but not afterwards.
Illustrations
(a) A proposes, by a letter sent by post, to sell his house to B. B accepts the proposal by a letter sent by post. A may revoke his proposal at any time before or at the moment when B posts his letter of acceptance, but not afterwards.
(b) B may revoke his acceptance at any time before or at the moment when the letter communicating it reaches A, but not afterwards.
Legal Commentary & Landmark Judgments: Section 5
Section 5 of the Indian Contract Act, 1872 specifies the statutory time limits within which a proposer may revoke an offer and an acceptor may revoke an acceptance before contractual rights crystallize.
Even if an offeror undertakes to keep an offer open for a specified period, that promise is revocable at will unless supported by independent consideration (an option contract).
In commercial tendering and bidding, bidders frequently attempt to revoke their offers before official award letters are issued. Section 5 guarantees that until acceptance is put in transmission, an offer remains purely revocable, unless a statutory or contractual earnest money forfeiture clause explicitly binds the tenderer under administrative law.