When does property pass in a contract for the sale of unascertained goods?

Property in unascertained goods can never pass at the moment the contract is made — however firmly the parties may have agreed on price, quantity, and description, the law insists that ownership cannot shift until the very goods meant for that particular buyer have been singled out from the general mass and unconditionally set aside for him, and Sections 18 and 23 of the Sale of Goods Act, 1930 work out precisely how and when that singling-out must occur.

Why Unascertained Goods Are Treated Differently

Unascertained or generic goods are those defined only by description or sample, not identified and agreed upon at the moment the contract is made — this distinguishes them sharply from specific goods, which are already identified when the contract is formed. Because the very identity of the goods that will eventually belong to the buyer remains undetermined at the contract stage, the law cannot allow property to pass immediately, as it does under Section 20 for specific goods in a deliverable state. Instead, a contract for unascertained goods necessarily begins life as a mere agreement to sell, ripening into a completed sale — and only then transferring property — once the goods are ascertained and appropriated.

The Threshold Rule: Ascertainment Is Indispensable — Section 18

Section 18 lays down the foundational bar — where there is a contract for the sale of unascertained goods, no property in the goods is transferred to the buyer unless and until the goods are ascertained. This is not a mere procedural formality; the Supreme Court has held that ascertainment occurs specifically when the goods are actually separated out from a larger stock and delivered or otherwise set aside for the particular buyer. Crucially, the mere fact that the goods are to come out of an identified or specified bulk — say, a particular warehouse or a named consignment — does not, by itself, ascertain them or transfer property to the buyer. Ascertainment and appropriation, though closely related, are treated as two distinct conceptual steps: ascertainment identifies which physical goods will answer the contract, while appropriation is the further act of committing those identified goods irrevocably to that particular contract.

The Operative Rule: Unconditional Appropriation — Section 23(1)

Once ascertainment has occurred, Section 23(1) supplies the actual rule for the passing of property. It provides that where there is a contract for the sale of unascertained or future goods, sold by description, and goods of that description and in a deliverable state are unconditionally appropriated to the contract — either by the seller with the assent of the buyer, or by the buyer with the assent of the seller — the property in the goods thereupon passes to the buyer. Such assent, importantly, may be express or implied, and may be given either before or after the appropriation is made.

The central and most litigated question under this provision is what actually amounts to an "unconditional appropriation," as distinguished from a merely tentative or revocable setting-aside of goods. The courts have consistently held that a seller who sets aside particular bales or units in his own warehouse, intending them for a particular buyer, has not thereby unconditionally appropriated the goods — he remains at liberty to change his mind and substitute other conforming goods until the buyer has been notified of the appropriation and has assented to take those specific goods. The act of appropriation must be final and irrevocable, leaving the seller no further discretion to alter which physical goods will satisfy the contract, before property can be said to pass.

Deemed Appropriation on Delivery to a Carrier — Section 23(2)

Section 23(2) creates an important deeming provision that resolves much of the practical difficulty in commercial and shipping transactions. It states that where the seller delivers the goods to the buyer, or to a carrier or other bailee for the purpose of transmission to the buyer, and does not reserve the right of disposal, he is deemed to have unconditionally appropriated the goods to the contract. Delivery to a carrier, in other words, itself constitutes the decisive act of appropriation, and property passes to the buyer at that very point, provided the seller has not reserved control over the goods.

This principle was applied by the Privy Council in Nippon Yusen Kaisha v. Ramjiban Serowgee, where the seller inserted the buyer's name as shipper in the mate's receipt for the goods. This conduct showed no reservation of any right of disposal on the seller's part, and property was accordingly held to have passed to the buyer upon shipment itself. This can be usefully contrasted with situations where the seller, instead of naming the buyer in the shipping documents, takes the bill of lading in his own name — such conduct demonstrates a clear intention to retain control over the goods, and property does not pass until the price is actually paid and the documents are handed over.

The Seller's Countervailing Power: Reservation of the Right of Disposal — Section 25

Section 25 gives the seller an express mechanism to prevent property from passing automatically under Section 23(2), even after delivery to a carrier — he may reserve the right of disposal of the goods, most commonly as a means of securing payment of the price before ownership shifts. A familiar commercial illustration of this technique is the Value Payable Post transaction, where the seller retains control of the goods throughout transit, releasing them to the buyer only against payment made on delivery. Where such a reservation exists, the deeming provision of Section 23(2) simply does not operate, and property remains with the seller notwithstanding that the goods have already left his physical possession and been handed over to the carrier.

Future Goods Follow the Same Rule

It is worth noting that Section 23 explicitly extends its language to "unascertained or future goods," meaning goods not yet in existence, or not yet acquired by the seller at the time of contracting, are governed by an identical rule. Since such goods cannot possibly be "specific" when the contract is made, a contract for their sale necessarily operates as an agreement to sell until goods answering the contractual description come into existence or into the seller's possession and are then unconditionally appropriated to that particular contract with mutual assent — at which point, precisely as with ordinary unascertained goods, property passes to the buyer.

Practical Consequences of the Ascertainment Rule

The timing of ascertainment and appropriation is not a mere theoretical nicety — it governs the allocation of risk under Section 26, which ties risk to the passing of property except where a contrary agreement or a party's fault dictates otherwise. This consequence was central in Agricultural Market Committee v. Shalimar Chemical Works Ltd., where goods dispatched from Kerala to Hyderabad were held to have passed in both property and risk to the buyer at the very point of despatch, since the buyer had already insured the goods and contractually agreed to bear any transit loss — making the precise moment of subsequent weighment or payment legally immaterial once despatch, coupled with appropriate assent, had already transferred ownership.

Summary Table