Keith Mack
Mistake of fact is a legal term that refers to a mistake about a situation that unintentionally leads to a crime or breach of contract. It is a material error in facts that can happen even in the most thoroughly researched transactions. Mistake of fact is different from a mistake of law, which occurs when one party is mistaken about the application of a contract law. Mistake of fact can be used as a defence in criminal cases, such as murder or rape, and in contract law, it can be argued as a defence, and if raised successfully, can lead to the agreement being found void.
| Characteristics | Values |
|---|---|
| Definition | An erroneous belief, at contracting, that certain facts are true. |
| Types | Mutual mistake, unilateral mistake, common mistake, and misunderstanding. |
| Effect on contract | The contract may be void, voidable, or rewritten. |
| Remedies | Monetary damages, rescission, reformation, or equitable remedy. |
| Examples | Misunderstanding of terms, laws, or information relevant to the contract; erroneous beliefs about the identity of a person or location. |
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Mutual mistake
A mutual mistake occurs when both parties to a contract are mistaken about the same material fact within the contract. In other words, there is a "'meeting of the minds', but the parties are mistaken. Hence, the contract is voidable.
For a mutual mistake to render a contract void, the item the parties are mistaken about must be material. When there is a material mistake about a material aspect of the contract, there is a question of the assumption of the risk. This risk may be determined contractually or according to custom.
An example of a mutual mistake would be contracting to dig a hole in someone's backyard, only to discover later that just below ground level exists solid rock, making it impossible to dig the hole as contracted.
To invoke the doctrine of mutual mistake, a party must present proof that the agreement, as expressed, does not represent a "meeting of the minds" between the parties in some material respect. The mutual mistake must be substantial and exist at the time the parties enter the contract. To establish mutual mistake, the moving party must overcome a heavy presumption and prove, by clear and convincing evidence, that the agreement did not express the intentions of either party.
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Unilateral mistake
A unilateral mistake in contract law occurs when only one party to a contract misinterprets or is mistaken about the subject matter or terms contained in the contract agreement. This type of mistake is generally more common than other kinds of contract mistakes, such as a mutual mistake.
- One party relied on a statement from the other about a material fact that the second party knew or should have known was mistaken by the first party.
- Clerical error that did not result in gross negligence.
- Mechanical calculations, provided that the other party does not try to take advantage of the mistake, or 'snatch up' the offer (involving a bargain that one did not intend to make, betrayed by an error in arithmetic, etc.).
In the case of a unilateral mistake, the contract can be rescinded or reformed. Rescission involves the complete cancellation of the contract and the restoration of the parties to their positions before the contract was entered into. Reformation, on the other hand, allows the parties to rewrite the terms according to their original understanding. Reformation is typically granted only if the non-mistaken party was unaware of the mistake and the mistake was not due to gross negligence.
It is important to note that the law governing mistakes in contracts can vary significantly from country to country.
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Contract rescission
Mistake of fact is a legal term that refers to a mistake about a situation that unintentionally leads to a breach of contract. It is distinct from a mistake of law, which refers to a lack of comprehension of what is illegal. Mistake of fact occurs when contracting parties enter a contract unknowingly using false information or different meanings. When the real information comes to light, the contract can be voided or changed.
There are two types of mistake of fact: unilateral mistakes and mutual mistakes. A unilateral mistake occurs when only one party is mistaken about an essential contract term. This type of mistake is generally more common than other types of contract mistakes, such as a mutual mistake. A unilateral mistake can void a contract when the other party has an unconscionable advantage in a contract because they fully understand the terms outlined in the document. If a unilateral mistake occurs during the negotiation, it could affect the outcome of the contract.
A mutual mistake occurs when both parties to a contract are mistaken about the same material fact within their contract. For a mutual mistake to void the agreement, the fact the parties are mistaken about must be material. An example of a mutual mistake would be two parties agreeing on the sale of violins without realizing the goods were worth much less than the agreed-upon price.
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Mistake of law
In most cases, a mistake of law is not a valid reason to void a contract. This is because ignorance of the law is generally not an excuse. However, if a party is induced to enter into a contract by a mistake of law, the contract may not be valid. For example, if an executive official gives a criminal false information about the law, and the criminal enters into a contract based on this mistake, they can void the contract when they realise their mistake.
A mistake of law specifically refers to a mistake made because someone was unaware of the law. This is distinct from a mistake of fact, which refers to a material error about the circumstances or facts that are essential to the contract. A mistake of fact can be an unintentional neglect of fact or evidence, or a mistaken belief about the meaning of a term or the identity of a person or location.
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Remedies
Mistakes of fact in contract law occur when one or both parties to a contract have a mistaken or false belief about a term that is essential to the meaning of the contract. This is distinct from a mistake of law, where a party enters into a contract without knowledge of the relevant law. Mistake of fact is a valid defence in a breach of contract claim, and if raised successfully, it can lead to the contract being deemed void or voidable.
Mistakes of fact can be categorised into two types: unilateral mistakes and mutual mistakes. The remedies available will depend on the type of mistake and the specific circumstances of the case.
Unilateral Mistake
A unilateral mistake occurs when only one party is mistaken about the subject matter or terms of the contract. This type of mistake is generally more common than mutual mistakes. Unilateral mistakes typically do not make a contract void, as the principle of "let the buyer beware" applies. However, there are certain situations where a unilateral mistake can lead to the contract being voidable. These include:
- The non-mistaken party was aware or should have been aware of the mistake, and the mistaken party relied on a statement made by the non-mistaken party.
- Clerical errors or mechanical calculations that resulted in an error, provided that the non-mistaken party does not try to take advantage of the mistake.
The legal remedies for a unilateral mistake typically include:
- Rescission: This involves cancelling the contract and restoring the parties to their original positions before the contract was formed. Rescission is intended to prevent the non-mistaken party from taking advantage of the mistaken party.
- Reformation: This involves rewriting the contract to reflect the parties' original understanding of its terms. Reformation is applicable when the non-mistaken party was not aware of the mistake.
- Monetary Damages: In some cases, monetary damages may be awarded if the mistake of fact resulted in significant losses.
Mutual Mistake
A mutual mistake occurs when both parties to a contract are mistaken about the same material fact within the contract. For a mutual mistake to render a contract void or voidable, the mistaken fact must be material, meaning it is central to the purpose of the contract. Collateral mistakes, which do not go to the heart of the contract, do not afford the right of rescission.
The common remedy for a mutual mistake is for the court to declare the contract void, meaning neither party is bound by its terms or obligated to perform their duties. In some cases, the court may rule that a new contract is negotiated through mutual assent or that reparations are made for the mistake.
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Frequently asked questions
A mistake of fact in contract law occurs when one or both parties enter a contract unknowingly using false information or different meanings. This can be further divided into unilateral mistakes and mutual mistakes.
A unilateral mistake occurs when only one party is mistaken or holds a false belief about the subject matter or terms contained in the contract agreement. This is the most common type of mistake in contract law.
A mutual mistake occurs when both parties are mistaken about the same material fact within their contract. This renders the contract voidable.
A mistake of law occurs when a party enters into a contract without the knowledge of the law in the country. A mistake of fact, on the other hand, is a mistake about the circumstances or facts essential to the contract.
Yes, a contract can be voided or changed if a mistake of fact is discovered. The court can decide to void the contract if the error is material to the contract.
