In contract law, a mistake is an erroneous belief, at contracting, that certain facts are true. It can be argued as a defense, and if raised successfully can lead to the agreement in question being found void ab initio or voidable, or alternatively an equitable remedy may be provided by the courts. Common law has identified three different types of mistake in contract: the 'unilateral mistake', the 'mutual mistake' and the 'common mistake'. The distinction between the 'common mistake' and the 'mutual mistake' is important.
Photo Production Ltd v Securicor Transport Ltd[1980] UKHL 2 is an English contract law case decided by the House of Lords on construction of a contract and the doctrine of fundamental breach.
English contract law is the body of law that regulates legally binding agreements in England and Wales. With its roots in the lex mercatoria and the activism of the judiciary during the industrial revolution, it shares a heritage with countries across the Commonwealth, from membership in the European Union, continuing membership in Unidroit, and to a lesser extent the United States. Any agreement that is enforceable in court is a contract. A contract is a voluntary obligation, contrasting to the duty to not violate others rights in tort or unjust enrichment. English law places a high value on ensuring people have truly consented to the deals that bind them in court, so long as they comply with statutory and human rights.
The law of mistake comprises a group of separate rules in English contract law. If the law deems a mistake to be sufficiently grave, then a contract entered into on the grounds of the mistake may be void. A mistake is an incorrect understanding by one or more parties to a contract. There are essentially three types of mistakes in contract,
Leaf v International Galleries [1950] 2 KB 86 is an English contract law case concerning misrepresentation, mistake and breach of contract, and the limits to the equitable remedy of rescission.
Shogun Finance Ltd v Hudson [2003] UKHL 62 is an English contract law case decided in the House of Lords, on the subject of mistaken identity as a basis for rescission of a contract. The case has been the subject of much criticism in failing to effectively clarify the area of mistake to identity.
Carter v Boehm (1766) 3 Burr 1905 is a landmark English contract law case, in which Lord Mansfield established the duty of utmost good faith or uberrimae fidei in insurance contracts.
Interpreting contracts in English law is an area of English contract law, which concerns how the courts decide what an agreement means. It is settled law that the process is based on the objective view of a reasonable person, given the context in which the contracting parties made their agreement. This approach marks a break with previous a more rigid modes of interpretation before the 1970s, where courts paid closer attention to the formal expression of the parties' intentions and took more of a literal view of what they had said.
Frederick E Rose (London) Ltd v William H Pim Junior & Co Ltd[1953] 2 QB 450 is an English contract law case concerning the rectification of contractual documents and the interpretation of contracts in English law.
Lloyds Bank Ltd. v. Bundy[1974] EWCA 8 is a landmark case in English contract law, on undue influence. It is remarkable for the judgment of Lord Denning MR who advanced that English law should adopt the approach developing in some American jurisdictions that all impairments of autonomy could be collected under a single principle of "inequality of bargaining power."
Unconscionability in English law is a field of contract law and the law of trusts, which precludes the enforcement of voluntary obligations unfairly exploiting the unequal power of the consenting parties. "Inequality of bargaining power" is another term used to express essentially the same idea for the same area of law, which can in turn be further broken down into cases on duress, undue influence and exploitation of weakness. In these cases, where someone's consent to a bargain was only procured through duress, out of undue influence or under severe external pressure that another person exploited, courts have felt it was unconscionable to enforce agreements. Any transfers of goods or money may be claimed back in restitution on the basis of unjust enrichment subject to certain defences.
Cundy v Lindsay (1877–78) LR 3 App Cas 459 is an English contract law case on the subject of mistake, introducing the concept that contracts could be automatically void for mistake as to identity, where it is of crucial importance. Some lawyers argue that such a rule is at odds with subsequent cases of mistake as to identity, such as Phillips v Brooks, where parties contracting face to face are merely voidable for fraud, protecting a third party buyer. However, the ultimate question is whether the identity of the other contracting party was crucial to the contract. The problem for the courts was essentially which of the two innocent parties should bear the loss of the goods.
A Quistclose trust is a trust created where a creditor has lent money to a debtor for a particular purpose. If the debtor uses the money for any other purpose, then it is held on trust for the creditor. Any inappropriately spent money can then be traced, and returned to the creditors. The name and trust comes from the House of Lords decision in Barclays Bank Ltd v Quistclose Investments Ltd (1970), although the underlying principles can be traced back further.
Great Peace Shipping Ltd v Tsavliris (International) Ltd [2002] EWCA Civ 1407 is a case on English contract law and on maritime salvage. It investigates when a common mistake within a contractual agreement will render it void.
McRae v Commonwealth Disposals Commission, is an Australian contract law case, relevant for English contract law, concerning the common mistake about the possibility of performing an agreement.
Karsales (Harrow) Ltd v Wallis [1956] EWCA Civ 4 is an English Court of Appeal decision which established fundamental breach as a major English contract law doctrine. Denning LJ MR gave the leading judgment replacing the Rule of Strict Construction, which require a literal approach to the construction of contract terms.
Westdeutsche Landesbank Girozentrale v Islington LBC[1996] UKHL 12, [1996] AC 669 is a leading English trusts law case concerning the circumstances under which a resulting trust arises. It held that such a trust must be intended, or must be able to be presumed to have been intended. In the view of the majority of the House of Lords, presumed intention to reflect what is conscionable underlies all resulting and constructive trusts.
Solle v Butcher [1950] 1 KB 671 is an English contract law case, concerning the right to have a contract declared voidable in equity. Denning LJ reaffirmed a class of "equitable mistakes" in his judgment, which enabled a claimant to avoid a contract. Denning LJ said,
... a contract will be set aside if the mistake of the one party has been induced by a material misrepresentation of the other, even though it was not fraudulent or fundamental; or if one party, knowing that the other is mistaken about the terms of an offer, or the identity of the person by whom it is made, lets him remain under his delusion and concludes a contract on the mistaken terms instead of pointing out the mistake.... A contract is also liable in equity to be set aside if the parties were under a common misapprehension either as to facts or as to their relative and respective rights, provided that the misapprehension was fundamental and that the party seeking to set it aside was not himself at fault.
Cooper v Phibbs [1867] UKHL 1 is an English contract law case, concerning the doctrine of mistake.
