Carlill v Carbolic Smoke Ball Company [1892] EWCA Civ 1

📌 Facts

The Carbolic Smoke Ball Company published an advertisement in the Pall Mall Gazette promising to pay £100 to any person who contracted influenza after using their carbolic smoke ball three times daily for two weeks. The advertisement further stated that £1,000 had been deposited with the Alliance Bank to demonstrate the company’s sincerity in their promise. Mrs Carlill purchased and used the smoke ball as directed but nonetheless contracted influenza. She brought an action to recover the £100 reward. The company defended on several grounds. One of those grounds was the fact that the advertisement was a mere puff.

📌 Issue

The issue is whether the advertisement was not intended as a legally binding promise but was merely a ‘puff’ with no legal effect.

📌 Decision

The Lords Justices were clear that the advertisement constituted a real and binding promise. In particular, Lindley LJ placed reliance on the statement about the deposit at the Alliance Bank:

“1000l. is deposited with the Alliance Bank, shewing our sincerity in the matter.” Now, for what was that money deposited or that statement made except to negative the suggestion that this was a mere puff and meant nothing at all? The deposit is called in aid by the advertiser as proof of his sincerity in the matter — that is, the sincerity of his promise to pay this 100l. in the event which he has specified.

In addition, Bowen LJ described how a contract to the world at large becomes a unilateral contract once performed by someone:

It is not a contract made with all the world. There is the fallacy of the argument. It is an offer made to all the world; and why should not an offer be made to all the world which is to ripen into a contract with anybody who comes forward and performs the condition? It is an offer to become liable to any one who, before it is retracted, performs the condition, and, although the offer is made to the world, the contract is made with that limited portion of the public who come forward and perform the condition on the faith of the advertisement.

📌 Analysis

The case remains a leading authority on unilateral contracts and the distinction between offers and invitations to treat. It primarily established that:

• an advertisement may constitute a legally binding unilateral offer, not merely an invitation to treat or a ‘puff’; and

• an offer may validly be made to the world at large, ripening into a contract with anyone who performs the stipulated conditions.