-If the contract involves a sale of goods (i.e. items that are movable) between merchants, then the acceptance does not have to mirror the terms of the offer for a valid contract to exist, unless:
(a) the terms of the acceptance significantly alter the original contract; or 
(b) the offeror objects within a reasonable time.

Therefore once a suggestion is accepted it can’t be revoked because it’s become a promise which creates a legal obligation between the parties.

Example ­Anita offers to shop for Priya’s car for Rs.10 lakhs and Priya accepts such a suggestion . Now, this became a promise.

-The existence of consideration distinguishes a contract from a gift. A gift is a voluntary and gratuitous transfer of property from one person to another, without something of value promised in return. Failure to follow through on a promise to make a gift is not enforceable as a breach of contract because there is no consideration for the promise.

•When it’s comes into existence after the offeree unconditionally accepts the offer. A proposal when accepted, become a promise.

•When 1 party introduces variations/conditions to the terms of the latest proposal, there is no acceptance. Such variations/conditions amount to a counter proposal/offer. No agreement. 

–The Def. offered to sell his estate to the Pl. on 6 Jun for 100 pound. On 8 June, in reply, the Pl. made a counter proposal to purchase at 950 pound. When the Def. refused to accept this offer on 27 June, the Pl. wrote again that he was prepared to pay the original sum demanded.

–The Court held that no contracted existed between them. The Pl. had rejected the original proposal on 8 June so that he was no longer capable of accepting it later. 

•An acceptance must be made within a reasonable period under section 6(b). 
•Acceptance must be expressed is some usual and reasonable manner, unless the proposer prescribe the manner in which it is to be accepted under section 7(b).

•In Malaysia the Contract Act stipulates different times when the communication of an acceptance is complete.

–Under the English Law past consideration is not a good consideration. However, in Malaysia, Past Consideration is a good consideration.

2. Executed Consideration

–An act which has been done to fulfill the contract. 

3. Executory Consideration
–An act or promise that will be done in future.

•A married couple who live in Sri Lanka returned to England for a vacation. The husband later returned to work in Sri Lanka, but the wife stayed back in England on doctors advice. He promised her £30 a month until he returned. Later, he wrote to the wife saying that it would be better if they remained apart. The wife sued him on the promise to pay her £30 a month. The Court of Appeal held that the arrangements made between husband and wife was not a contract attended by legal consequences. The presumption that there was no intention to contract was not rebutted by the wife, Mrs. Balfour. Therefore, they were presumed to have no intention to contract.

•When it’s comes into existence after the offeree unconditionally accepts the offer. A proposal when accepted, become a promise.

•When 1 party introduces variations/conditions to the terms of the latest proposal, there is no acceptance. Such variations/conditions amount to a counter proposal/offer. No agreement.  

•Sec. 2(b) Contract Act 1950 say that:

  “when the person to whom the proposal is made signifies his assent   thereto, the proposal is said to be accepted: a proposal, when   accepted, becomes a promise;”