Meaning and statutory basis (Section 2(a)) #

An offer (proposal) is defined in Section 2(a) of the Indian Contract Act, 1872. A person is said to make a proposal when they signify to another person their willingness to do or to abstain from doing something, with a view to obtaining the assent of that other person. When the proposal is accepted, it becomes a promise and may culminate in an agreement and a contract, subject to other legal requirements.

Essentials of a Valid Offer #

1) Intention to be bound (Legal intention) #

• The proposer must show a serious intention to create legal relations; it must not be a mere statement, negotiation, or sales puff.
• Case: Carlill v. Carbolic Smoke Ball Co. — the advertisement was treated as a real offer (not puff) because it was serious and backed by the deposit. On the contrary, in the case of Mrs. Balfour v. Mr. Balfour such an intention to enter into legal relationship was not observed, as the promise was made in a social setting.

2) Certainty and definiteness #

• The terms must be clear, certain and unambiguous; vague proposals cannot be accepted into a contract.
• Case support: Carlill — the conditions and reward were sufficiently definite to be enforceable.
• Illustration: “I may sell my bike around ₹10,000” (vague) vs “I will sell my bike to you for ₹10,000, payable tomorrow” (certain).

3) Communication of offer #

• An offer must be communicated to the offeree; a person cannot accept an offer without knowledge of it.
• Case: Lalman Shukla v. Gauri Dutt — reward was denied because the act was done without knowledge of the offer.

4) Capacity to create acceptance (capable of being accepted) #

• The offer must be such that it can be accepted clearly, either by words or by conduct, depending on its nature.
• Case: Carlill — a unilateral offer can be accepted by performance (doing the act), without separate communication.

5) Lawfulness of offer #

• The offer must have a lawful object and must not be illegal/immoral/opposed to public policy.
• Illustration: “I will pay ₹5,000 to forge a document” is unlawful and unenforceable.

6) Class of offer: Specific or General #

• An offer may be:
  • Specific (to a particular person) — only that person can accept.
  • General (to the public) — anyone can accept by performing the conditions.
• Case: Carlill — classic general offer accepted by performance.

7) Must not be confused with Invitation to Offer (Invitation to Treat) #

• Many commercial statements look like offers, but are actually invitations to make an offer; contract forms only when the seller accepts the buyer’s offer.
• Cases:
  • Pharmaceutical Society v. Boots Cash Chemists — shelf display is invitation; customer’s act at cash counter is the offer.
  • Fisher v. Bell — shop-window display is invitation, not offer.
  • Partridge v. Crittenden — ordinary advertisement is invitation, not offer.
  • Harvey v. Facey — “lowest price” is only information, not an offer.

Conclusion #

Thus, a valid offer must be intended, certain, communicated, lawful, and capable of acceptance, while carefully distinguished from an invitation to offer.

Invitation to Offer (Invitation to Treat) #

Meaning #

An invitation to offer is not an offer in itself. It is only an expression of willingness to negotiate or to receive offers, leaving the final decision to accept or reject with the person who makes the invitation. The legal significance is that no contractual obligation arises merely because someone responds to an invitation; a contract forms only when an offer is made and then accepted.

Common instances #

Typically, display of goods in a shop, price lists, and many advertisements are treated as invitations to offer. This approach prevents the inviter from being bound to supply unlimited quantities merely because multiple persons “accept” something that was never intended as a binding offer.

Case Laws #

A) Reward, Unilateral Offer and Knowledge of Offer #

1) Lalman Shukla v. Gauri Dutt (Allahabad HC, 1913) #

Facts: The defendant’s nephew went missing. The defendant instructed his servant, Lalman Shukla, to search for the boy. After the servant had already left to search, the defendant publicly announced a reward for anyone who found and brought back the boy. Shukla later found the boy and returned him, and then claimed the reward.
Issue: Whether a person can claim a reward when the act was performed without knowledge of the reward announcement.
Held: The claim was rejected. The court held that knowledge of the offer is essential for valid acceptance. Since Shukla did not know of the reward when he undertook and performed the act, there was no acceptance in law and therefore no contract for payment of reward.

2) Carlill v. Carbolic Smoke Ball Co. (Court of Appeal, 1893) #

Facts: The company advertised that it would pay £100 to anyone who used its smoke ball as directed and still contracted influenza, and it stated that money had been deposited to show sincerity. Mrs. Carlill used the product according to the directions but still contracted influenza. The company refused to pay.
Issues: Whether the advertisement amounted to a binding offer or mere sales puff; whether acceptance required separate communication; and whether consideration was present.
Held: The court held that the advertisement constituted a unilateral offer to the world, capable of acceptance by anyone who performed its conditions. Acceptance occurred through performance, and no separate communication of acceptance was required. Consideration existed because the claimant acted on the offer and undertook inconvenience/effort in using the product as prescribed. The company was liable to pay.

B) Negotiations / supply of information vs offer #

3) Harvey v. Facey (Privy Council, 1893) #

Facts: Harvey asked Facey by telegram whether he would sell a property and requested the “lowest cash price.” Facey replied stating only the lowest price. Harvey then replied that he agreed to buy at that price. Facey refused to sell.
Issue: Whether Facey’s telegram stating the lowest price constituted an offer capable of acceptance.
Held: The Privy Council held that the reply was merely a statement of information (lowest price) and not an offer showing willingness to sell. Harvey’s “we agree to buy” was an offer, but since Facey never accepted it, no contract was formed.

C) Display of goods in shops — invitation to offer #

4) Pharmaceutical Society of Great Britain v. Boots Cash Chemists (Court of Appeal, 1953) #

Facts: Boots operated a self-service store. Customers selected goods from shelves and paid at the cashier. The legal question arose because certain goods were required to be sold under the supervision of a registered pharmacist.
Issue: Whether the display of goods on shelves constituted an offer, making the contract complete when the customer picked up the goods, or whether it was an invitation to treat and the contract formed only at the cashier.
Held: The court held that the display of goods on shelves was an invitation to treat. The customer makes the offer at the cash desk, and the store accepts when it processes the sale. This ensured compliance with the requirement of pharmacist supervision at the point of acceptance.

5) Fisher v. Bell (Divisional Court, 1961) #

Facts: A shopkeeper displayed a prohibited knife in the shop window with a price tag. He was prosecuted for “offering for sale” under the relevant statute.
Issue: Whether a shop-window display amounts to an offer for sale.
Held: The court held that a shop-window display is an invitation to treat, not an offer. Therefore, the statutory offence of “offering for sale” was not established.

D) Advertisements of goods — usually invitation to offer #

6) Partridge v. Crittenden (Queen’s Bench Division, 1968) #

Facts: The defendant advertised birds for sale in a classified advertisement. Proceedings were initiated under bird-protection law alleging that he had “offered for sale” a protected wild bird (commonly prosecuted through animal welfare enforcement mechanisms).
Issue: Whether such an advertisement constituted an offer for sale or merely an invitation to treat.
Held: The court held that a general advertisement of this kind is ordinarily an invitation to treat, not an offer. Consequently, the charge of “offering for sale” failed.

E) Intention to create a legal Relationship #

7) Mrs. Balfour v. Mr. Balfour #

Facts: The husband and wife, while still in a normal marital relationship, agreed that the husband would pay the wife £30 per month when she stayed in England for medical reasons. Subsequently, the marriage deteriorated and the husband stopped the payments. The wife sued to enforce the promise.

Issue: Whether a promise made between spouses in the course of ordinary domestic life constitutes an enforceable contract—specifically, whether there was intention to create legal relations.

Held: The Court of Appeal held no contract existed. Domestic arrangements between spouses, made while living together in amity, are presumed not to be intended to have legal consequences. In the absence of clear evidence rebutting that presumption, the wife could not enforce the promise.

Conclusion #

To conclude, under Section 2(a) of the Indian Contract Act, 1872, an offer must be a clear and definite expression of willingness to be bound the moment it is accepted. Equally important is the distinction between a true offer and an invitation to offer, because everyday commercial dealings would become unworkable if every display or advertisement automatically created contractual liability. The cases bring out a coherent rule: a mere communication of price or information is not an offer (Harvey v. Facey); the display of goods in a shop is ordinarily only an invitation to treat, where the customer makes the offer and the shop accepts it at the counter (Boots, Fisher); and most advertisements are similarly invitations to treat (Partridge). At the same time, the law recognises an exception where the advertisement is specific, certain and promissory in nature, especially when it offers a reward upon performance—such an advertisement may amount to a unilateral offer capable of acceptance by conduct (Carlill). Thus, these principles maintain certainty in contract formation while also protecting commercial convenience and fairness, ensuring that only genuine offers—intended to create legal obligations—are enforceable.