Carlill v. Carbolic Smoke Ball Company  1 QB 256, Court of Appeal
The defendants advertised their medicinal product, the now infamous ‘carbolic smoke ball’, in various newspapers in the following terms:
‘100l. reward will be paid by the Carbolic Smoke Ball Company to any person who contracts the increasing epidemic influenza, colds, or any disease caused by taking cold, after having used the ball three times daily for two weeks according to the printed directions supplied with each ball. 1000l. is deposited with the Alliance Bank, Regent Street, shewing our sincerity in the matter.
During the last epidemic of influenza many thousand carbolic smoke balls were sold as preventives against this disease, and in no ascertained case was the disease contracted by those using the carbolic smoke ball.
One carbolic smoke ball will last a family several months, making it the cheapest remedy in the world at the price, 10s., post free. The ball can be refilled at a cost of 5s. Address, Carbolic Smoke Ball Company, 27, Princes Street, Hanover Square, London.’
The plaintiff, in reliance upon this advertisement, purchased and used the product as directed but subsequently caught influenza. She sued for payment of the £100 and succeeded before Hawkins J. The defendants appealed to the Court of Appeal but the appeal was dismissed. It was held that the terms of the advertisement constituted an offer, the terms of which were accepted by the plaintiff with the result that she was entitled to recover the promised £100.
. . . We were asked to say that this document was a contract too vague to be enforced. The first observation which arises is that the document itself is not a contract at all, it is only an offer made to the public. The defendants contend next, that it is an offer the terms of which are too vague to be treated as a definite offer, inasmuch as there is no limit of time fixed for the catching of the influenza, and it cannot be supposed that the advertisers seriously meant to promise to pay money to every person who catches the influenza at any time after the inhaling of the smoke ball. It was urged also, that if you look at this document you will find much vagueness as to the persons with whom the contract was intended to be made— that, in the first place, its terms are wide enough to include persons who may have used the smoke ball before the advertisement was issued; at all events, that it is an offer to the world in general, and, also, that it is unreasonable to suppose it to be a definite offer, because nobody in their senses would contract themselves out of the opportunity of checking the experiment which was going to be made at their own expense. It is also contended that the advertisement is rather in the nature of a puff or a proclamation than a promise or offer intended to mature into a contract when accepted. But the main point seems to be that the vagueness of the document shows that no contract whatever was intended. It seems to me that in order to arrive at a right conclusion we must read this advertisement in its plain meaning, as the public would understand it. It was intended to be issued to the public and to be read by the public. How would an ordinary person reading this document construe it?
It was intended unquestionably to have some effect, and I think the effect which it was intended to have, was to make people use the smoke ball, because the suggestions and allegations which it contains are directed immediately to the use of the smoke ball as distinct from the purchase of it. It did not follow that the smoke ball was to be purchased from the defendants directly, or even from agents of theirs directly. The intention was that the circulation of the smoke ball should be promoted, and that the use of it should be increased. The advertisement begins by saying that a reward will be paid by the Carbolic Smoke Ball Company to any person who contracts the increasing epidemic after using the ball. It has been said that the words do not apply only to persons who contract the epidemic after the publication of the advertisement, but include persons who had previously contracted the influenza. I cannot so read the advertisement. It is written in colloquial and popular language, and I think that it is equivalent to this: ‘100l. will be paid to any person who shall contract the increasing epidemic after having used the carbolic smoke ball three times daily for two weeks’. And it seems to me that the way in which the public would read it would be this, that if anybody, after the advertisement was published, used three times daily for two weeks the carbolic smoke ball, and then caught cold, he would be entitled to the reward. Then again it was said: ‘How long is this protection to endure? Is it to go on for ever, or for what limit of time?’
I think that there are two constructions of this document, each of which is good sense, and each of which seems to me to satisfy the exigencies of the present action. It may mean that the protection is warranted to last during the epidemic, and it was during the epidemic that the plaintiff contracted the disease.
I think, more probably, it means that the smoke ball will be a protection while it is in use. That seems to me the way in which an ordinary person would understand an advertisement about medicine, and about a specific against influenza. It could not be supposed that after you have left off using it you are still to be protected for ever, as if there was to be a stamp set upon your forehead that you were never to catch influenza because you had once used the carbolic smoke ball. I think the immunity is to last during the use of the ball. That is the way in which I should naturally read it, and it seems to me that the subsequent language of the advertisement supports that construction. It says: ‘During the last epidemic of influenza many thousand carbolic smoke balls were sold, and in no ascertained case was the disease contracted by those using’ (not ‘who had used’) ‘the carbolic smoke ball’, and it concludes with saying that one smoke ball will last a family several months (which imports that it is to be efficacious while it is being used), and that the ball can be refilled at a cost of 5s. I, therefore, have myself no hesitation in saying that I think, on the construction of this advertisement, the protection was to ensure during the time that the carbolic smoke ball was being used. My brother, [Lord Justice Lindley], thinks that the contract would be sufficiently definite if you were to read it in the sense that the protection was to be warranted during a reasonable period after use. I have some difficulty myself on that point; but it is not necessary for me to consider it further, because the disease here was contracted during the use of the carbolic smoke ball.
Was it intended that the 100l. should, if the conditions were fulfilled, be paid? The advertisement says that 1000l. is lodged at the bank for the purpose. Therefore, it cannot be said that the statement that 100l. would be paid was intended to be a mere puff. I think it was intended to be understood by the public as an offer which was to be acted upon.
But it was said there was no check on the part of the persons who issued the advertisement, and that it would be an insensate thing to promise 100l. to a person who used the smoke ball unless you could check or superintend his manner of using it. The answer to that argument seems to me to be that if a person chooses to make extravagant promises of this kind he probably does so because it pays him to make them, and, if he has made them, the extravagance of the promises is no reason in law why he should not be bound by them.
It was also said that the contract is made with all the world—that is, with everybody; and that you cannot contract with everybody. 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 anyone 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. It is not like cases in which you offer to negotiate, or you issue advertisements that you have got a stock of books to sell, or houses to let, in which case there is no offer to be bound by any contract. Such advertisements are offers to negotiate— offers to receive offers—offers to chaffer, as, I think, some learned judge in one of the cases has said. If this is an offer to be bound, then it is a contract the moment the person fulfils the condition . . .
Then it was said that there was no notification of the acceptance of the contract. One cannot doubt that, as an ordinary rule of law, an acceptance of an offer made ought to be notified to the person who makes the offer, in order that the two minds may come together. Unless this is done the two minds may be apart, and there is not that consensus which is necessary according to the English law—I say nothing about the laws of other countries—to make a contract. But there is this clear gloss to be made upon that doctrine, that as notification of acceptance is required for the benefit of the person who makes the offer, the person who makes the offer may dispense with notice to himself if he thinks it desirable to do so, and I suppose there can be no doubt that where a person in an offer made by him to another person, expressly or impliedly intimates a particular mode of acceptance as sufficient to make the bargain binding, it is only necessary for the other person to whom such offer is made to follow the indicated method of acceptance; and if the person making the offer, expressly or impliedly intimates in his offer that it will be sufficient to act on the proposal without communicating acceptance of it to himself, performance of the condition is a sufficient acceptance without notification . . .
Now, if that is the law, how are we to find out whether the person who makes the offer does intimate that notification of acceptance will not be necessary in order to constitute a binding bargain? In many cases you look to the offer itself. In many cases you extract from the character of the transaction that notification is not required, and in the advertisement cases it seems to me to follow as an inference to be drawn from the transaction itself that a person is not to notify his acceptance of the offer before he performs the condition, but that if he performs the condition notification is dispensed with. It seems to me that from the point of view of common sense no other idea could be entertained. If I advertise to the world that my dog is lost, and that anybody who brings the dog to a particular place will be paid some money, are all the police or other persons whose business it is to find lost dogs to be expected to sit down and write me a note saying that they have accepted my proposal? Why, of course, they at once look after the dog, and as soon as they fi nd the dog they have performed the condition. The essence of the transaction is that the dog should be found, and it is not necessary under such circumstances, as it seems to me, that in order to make the contract binding there should be any notification of acceptance. It follows from the nature of the thing that the performance of the condition is sufficient acceptance without the notification of it, and a person who makes an offer in an advertisement of that kind makes an offer which must be read by the light of that common sense reflection. He does, therefore, in his offer impliedly indicate that he does not require notification of the acceptance of the offer.
Lindley and A.L. Smith LJ delivered concurring judgments.