An offer is a promise or undertaking of an offeror to be contractually bound in the event of an unconditional acceptance being made. An offer must be clear, certain and final. If it is not, any purported acceptance will not result in a contract.
Types of contracts
UNILATERAL
A unilateral contract is when one party makes an offer in terms which call for an act to be performed – performance of the act constitutes acceptance and this is when a contract is made. In unilateral contracts, only one party (the offeror) assumes an obligation. Acceptance of the offer does not need to be communicated and only performance of the required act(s) will equate to acceptance, i.e. promising to perform the act does not constitute acceptance.
CASES: Carlill v Carbollic Smoke Co.
Errington v Errington and Woods
BILATERAL
In a bilateral contract, two parties assume an obligation to each other by exchanging promises. Bilateral contracts are the most common type.
RULE | CASE | ||||
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An offer must be clear and certain | GIBSON V MAN CITY COUNCIL STORER V MAN CITY COUNCIL | ||||
Offer must be communicated | TAYLOR V LAIRD | ||||
Advert – not offer but invitation to treat | PARTRIDGE V CRITTENDEN | ||||
| CARLILL V CARBOLLIC SMOKE BALL CO | ||||
| GRAINGER V GOUGH | ||||
Display of goods for sale – invitation to treat | FISHER V BELL (shop window) PHARMACEUTICAL SOC GB V BOOTS (shelves) | ||||
Invitation to tender – invitation to treat | SPENCER V HARDING | ||||
| HARVELA INVESTMENTS V ROYAL TRUST CO | ||||
| BLACKPOOL FYLDE AERO CLUB V BLACKPOOL BOROUGH COUNCIL | ||||
Auctioneer’s requests for bids = invitation to treat, not an offer | PAYNE V CAVE | ||||
| BARRY V DAVIES | ||||
Websites are ITTs not offers | ARGOS TV CASE | ||||
REQUIREMENTS OF A VALID OFFER | |||||
RULE | CASE | EXCEPTION | CASE | ||
| GIBSON V MANCHESTER CC City treasurer wrote to G saying that the council ‘may be prepared to sell the house at 2180. G completed application form and sent it back, as requested. Council subsequently changed its policy and could not proceed with G’s application. HELD: There was no binding contract because no offer was made. The council’s letter stated it ‘may be prepared’ to sell the house – this lacked clarity and certainty. STORER V MANCHESTER CC Town clerk sent C a letter which stated ‘I enclose an agreement for sale’. C signed and returned agreement as instructed. Council’s policy changed prior to town clerk signing agreement. HELD: Letter = offer because its terms were clear and certain. Acceptance took place when C signed and returned letter therefore there was a binding contract. | ||||
Communication: An offer must be communicated.
| TAYLOR V LAIRD The captain of a ship resigned during a voyage, but continued to offer navigation services for the remainder of the voyage even though this had not been requested by the owner of the ship. He later claimed in the courts for proper remuneration for his services from the owner. HELD: The captain had not communicated his offer to provide such services. As such the owner did not have the opportunity to refuse or accept the offer as he had no knowledge of its existence. There was no binding contract. | ||||
| PARTRIDGE V CRITTENDON Partridge placed an advertisement containing the words ‘Advertisement of Bramble Finch Cocks and Hens’. Partridge was convicted of the offence of offering the birds for sale contrary to the Protection of Birds Act 1954 and appealed. HELD: Advert was not an offer, but an invitation to treat therefore Partridge had not committed an offence. |
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Price list submitted by a wine merchant was held to be an invitation to treat and not an offer because the wine merchant would only have limited stock. Obiter from Lord Herschell suggests that if the supplier is also a manufacturer, the advert could amount to an offer as, theoretically, they would have an unlimited supply of goods.
D placed an advert om a newspaper offering to pay 100 to anyone who contracted influenza after buying and using their smoke ball as prescribed. C used smoke ball as instructed but still caught the flu. HELD: The advert was a unilateral offer. Carlill had accepted the offer by completing the required act therefore there was a binding contract. | ||
| FISHER V BELL Bell convicted of offering flick knives for sale contrary to the Restriction of Offensive Weapons Act 1969. HELD: Displaying goods on a shop window is not an offer, but an invitation to treat therefore Bell was not guilty. | ||||
| PHARMACEUTICAL SOC OF GB V BOOTS Under the Pharmacy and Poisons Act 1933, it was an offence to sell prohibited medicines unless the sale was supervised by a registered pharmacist. Two customers took prohibited medicines from the shelves of a self-service shop and bought them. HELD: Display of goods on shelves = ITT. Offer is made by the purchaser and accepted by the seller at the tills. Since there was a registered pharmacist supervising sales at the tills, Boots = not guilty. | ||||
| SPENCER V HARDING A circular was sent out whereby stock was offered for sale by tender. Plaintiff submitted the highest bid, but C would not accept. HELD: No contract had been made because an invitation to tender is an ITT. The tenders were offers which the seller could choose to accept or reject. |
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Two firms invited to submit sealed bids for a block of shares. Promise is made to sell to the highest bid. HELD: Commitment to sell to the highest bid meant that the invitation to tender constituted a contract. Therefore, seller had an obligation to sell to the highest bidder.
Plaintiff invited by council to make a bid for a concession to operate pleasure flights from the airport. Council made a promise to consider all bids, but failed to consider the Plaintiff’s bid, even though it was submitted by the deadline. HELD: Council had a contractual obligation to consider tenders conforming to the conditions if they promise that all tenders will be considered. | ||
Auction Sales GR: An auctioneer’s request for bids is an invitation to treat, not an offer. Auctioneer is entitled to accept/reject bids. Acceptance takes place when the auctioneer drops his hammer, and a bidder can revoke his offer before that point. | PAYNE V CAVE D made a bid of 40 and revoked his offer when the auctioneer delated in accepting his bid. HELD: D entitled to withdraw bid, as it was merely an offer that he could revoke any time before acceptance. |
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C made a bid of 200 each for two new engine analysers at an auction held without reserve. List price of items was 14,000 each and auctioneer refused to sell to C because the bid was too low. C sought damages of 27,600. HELD: In auctions without reserve, two contracts are made. 1 = bilateral contract as usual in all auction sales where an offer is made by the bidder and the fall of the hammer constitutes acceptance. 2 = unilateral where the auctioneer offers to sell to the person who makes the highest bid. Making the highest bid = acceptance. Therefore, D is in breach of the unilateral contract and C was entitled to damages amounting to the difference between the bid and the list price of the goods. | ||
| ARGOS TV CASE Argos mistakenly advertised TVs for sale at 3 and subsequently refused to accept any orders placed. The website was merely an advert and therefore an invitation to treat. Also, one customer placed an order for 80 TV sets. It could be argued that, had the advert been an offer, it couldn’t be accepted by a customer trying to snatch up a bargain (HARTOG V COLIN AND SHIELDS). |
RULE | CASE | |||||
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Rejection of an offer must be communicated. | ||||||
A counter-offer operates as a rejection of the original offer. | HYDE V WRENCH | |||||
| STEVENSON, JACQUES V MACLEAN | |||||
Offeror may revoke his offer any time before acceptance. | PAYNE V CAVE ROUTELEGDE V GRANT | |||||
Oferror not bound by promise to keep offer open for a specified period of time. | DICKINSON V DODDS | |||||
| DICKINSON V DODDS | |||||
Revocation must be communicated before acceptance | BYRNE V LEON | |||||
Revocation can be communicated by a third party (even if unauthorized). | DICKINSON V DODDS | |||||
Unilateral offer can be revoked before completion of the prescribed act. | GREAT NORTHERN RAILWAY V... |