Formation of a Contract of Sale under Section 5 of the Sale of Goods Act, 1930: Offer and Acceptance, Arrangements for Delivery and Payment, and Written, Oral, Mixed, Implied and Electronic Contracts

Section 5 is short and deliberately permissive. It says that a contract of sale is made by an offer and its acceptance, that the parties may arrange delivery and payment in any way they choose, and that the contract may take any form: writing, speech, a mixture of the two, or simply conduct. Its purpose is to remove obstacles to commercial dealing. It also reflects a deliberate departure from the old English position, under which contracts for goods above a certain value had to be evidenced in writing. In India no such formality applies to a sale of goods, unless some other law specifically requires it.

Five arrangements for delivery and payment, and five permitted forms of contract

1. The Section

Section 5, Sale of Goods Act, 1930

5. (1) A contract of sale is made by an offer to buy or sell goods for a price and the acceptance of such offer. The contract may provide for the immediate delivery of the goods or immediate payment of the price or both, or for the delivery or payment by instalments, or that the delivery or payment or both shall be postponed.

(2) Subject to the provisions of any law for the time being in force, a contract of sale may be made in writing or by word of mouth, or partly in writing and partly by word of mouth or may be implied from the conduct of the parties.

2. Offer and Acceptance

Section 5(1) does not restate the law of offer and acceptance. It relies on Sections 2 to 9 of the Contract Act, which apply through Section 3 of the 1930 Act. Three points arise often in sales.

Displays, catalogues, price lists and advertisements are ordinarily invitations to treat. The customer's order is the offer, which the seller may accept or refuse.
Quotations and tenders depend on their terms. A quotation stating a price is usually an invitation; a tender submitted in response to a call for tenders is an offer.
Standard terms exchanged between businesses may produce a battle of the forms, in which each document is a counter offer and the contract is concluded on the terms of the last one accepted by conduct.

📖 Grainger & Son v. Gough, [1896] AC 325 (HL)

Facts: A French wine merchant's agent in England circulated price lists to potential customers and forwarded their orders to France, where the merchant decided whether to accept them. The question, for tax purposes, was whether the merchant was trading in England, which depended on where his contracts were made.

Held: The House of Lords held that the contracts were made in France. The price list was not an offer that the customer accepted by ordering. It was an invitation to customers to make offers, and the merchant remained free to accept or decline each order, not least because his stock was limited.

Ratio: A price list circulated to customers is an invitation to treat, not an offer. The order is the offer, and the contract is made where and when the seller accepts it.

📖 Partridge v. Crittenden, [1968] 1 WLR 1204

Facts: A person placed an advertisement in a periodical listing birds for sale at a stated price each. He was prosecuted for offering for sale a wild bird, contrary to a statute protecting such birds.

Held: The conviction was quashed. An advertisement of goods for sale in a periodical is an invitation to treat, not an offer. If it were an offer, the advertiser would be bound to sell to every reader who accepted, which could not have been intended where his stock was limited.

Ratio: An advertisement of goods for sale is ordinarily an invitation to treat. The same reasoning applies to product listings on websites and in catalogues.

3. Arrangements for Delivery and Payment

Immediate delivery and immediate payment is the ordinary cash sale.
Immediate delivery with deferred payment is a credit sale. Property may pass at once even though the price is not yet paid, unless the seller reserves title.
Deferred delivery with immediate payment is a prepaid order, common in online sales.
Deferred delivery and deferred payment is a forward contract, where both performances are postponed to a future date.
Delivery or payment by instalments is expressly permitted. Under Section 38, unless otherwise agreed, the buyer is not bound to accept delivery by instalments, and Section 38(2) deals with the effect of defective instalments in a contract for delivery in stated instalments.

These arrangements matter because the Act's default rules respond to them. Under Section 32, unless otherwise agreed, delivery and payment are concurrent conditions, so the seller need not deliver unless the buyer is ready to pay, and the buyer need not pay unless the seller is ready to deliver. Section 5(1) allows the parties to vary that sequence as they wish.

4. The Form of the Contract

In writing: an exchange of letters, a purchase order and acknowledgment, or a signed agreement.
By word of mouth: an oral contract is fully valid, though harder to prove.
Partly in writing and partly by word of mouth: a telephone agreement confirmed by email or invoice, where the terms must be gathered from both.
Implied from conduct: a purchase at a self-service store, from a vending machine, or at an auction under Section 64, where no words of offer and acceptance are spoken.
Electronically: Section 10A of the Information Technology Act, 2000 provides that a contract is not unenforceable merely because it was formed by electronic means, and online sales are dealt with in a separate note.

⚠ Subject to any other law in force

Section 5(2) is expressly subject to other laws. A statute may require a particular form for particular goods or transactions, and the Indian Stamp Act, 1899 may require duty on a written instrument, affecting its admissibility in evidence though not the validity of the underlying sale. Regulated goods such as arms, drugs, explosives or certain agricultural produce may be sold only under licence or through prescribed channels. Where such a law applies, a contract made without the required formality may be unenforceable or void, whatever Section 5 says.

5. The Position Stated Shortly

Section 5(1): a contract of sale is made by an offer to buy or sell goods for a price and its acceptance, applying the Contract Act rules.
Grainger v. Gough and Partridge v. Crittenden: price lists and advertisements are invitations to treat.
Delivery and payment may be immediate, deferred or by instalments, as the parties choose.
Unless otherwise agreed, delivery and payment are concurrent conditions under Section 32, and the buyer need not accept delivery by instalments under Section 38.
Section 5(2): the contract may be written, oral, partly each, implied from conduct, or electronic.
Other laws may impose formalities or restrictions, which Section 5(2) expressly preserves.