Keith Mack
Contract law recognises certain situations in which parties may be excused from fulfilling their contractual obligations. These situations typically involve unforeseen events or circumstances beyond the control of either party, which occur after the formation of the contract and significantly alter the nature of the parties' obligations. Examples of excuses for non-performance include impossibility, impracticability, mistake, misrepresentation, fraud, illegality, duress, undue influence, and unconscionability. When a contract is breached, the law provides remedies to compensate the non-breaching party or enforce the agreement, such as compensatory damages, consequential damages, nominal damages, and equitable remedies. Understanding legal defences and excuses for non-performance requires careful legal consideration, and expert guidance is often invaluable.
| Characteristics | Values |
|---|---|
| Mistake | Mistake of law, mistake of fact |
| Formation of the contract | Lack of capacity, duress, misrepresentation, fraud, illegality, undue influence, unconscionability |
| Performance of the contract | Impossibility, impracticability |
| Other | Third-party beneficiaries, limitations on assignment, equitable remedies |
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What You'll Learn
Mistake of law
In contract law, a mistake is defined as an erroneous belief at the time of contracting that certain facts are true. This erroneous belief must relate to a matter of fact that is essential to the agreement, and it can be raised as a defence. If this defence is successful, the agreement in question may be found to be void ab initio (from the beginning) or voidable. Alternatively, an equitable remedy may be provided by the courts.
There are three broad categories of mistake recognised in common law: unilateral mistake, mutual mistake, and common mistake. A unilateral mistake occurs when only one party is mistaken about a certain fact, while a mutual mistake occurs when both parties share the same erroneous belief. A common mistake, as established in the House of Lords case of Bell v Lever Brothers Ltd., refers to a mistake about the subject matter of the contract, making its performance impossible. This mistake must be sufficiently fundamental to render the identity of the subject matter different from what was contracted.
It is important to note that ignorance of the law of the land is typically not accepted as an excuse for non-performance. The principle of ignorantia juris haud excusat, or ignorance of the law is no excuse, underpins this stance. However, ignorance of foreign law may be treated differently and can be considered on par with ignorance of fact, as seen in the case of Cooper v Phibbs.
In summary, while mistake of law is generally not a valid excuse for non-performance, there may be specific circumstances where it can impact the validity of a contract, particularly when it involves ignorance of foreign law or a fundamental mistake about the subject matter.
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Mistake of fact
A mistake of fact can be further categorized into two types: mutual mistake and unilateral mistake. A mutual mistake occurs when both parties share the same mistaken belief about a term in the contract. This renders the contract voidable, but it is important to note that the mistake must be about a material fact that goes to the heart of the contract. For example, both parties may believe there is a "meeting of the minds" only to discover later that they had different interpretations of the contract terms.
On the other hand, a unilateral mistake occurs when only one party misinterprets the subject matter or terms of the contract. Unilateral mistakes are more common than mutual mistakes. While they usually do not void a contract, they can make a contract voidable under certain conditions. For instance, if one party relied on a statement made by the other party about a material fact that they knew or should have known was mistaken.
In the case of a mistake of fact, the contract may be found void ab initio (from the beginning) or voidable, or the courts may provide an equitable remedy. It is important to note that an erroneous opinion about the value of the subject matter of the contract is not typically considered a mistake of fact. Additionally, state laws and the type of contract may define specific ways in which a contract can be breached due to a mistake of fact.
- A contract states that a shipment of "plates" is to be delivered. One party understands this to mean paper plates, while the other believes it to mean ceramic plates. This is a mistake of fact.
- A homeowner hires a contractor to paint their house, expecting the garage to be included as it is considered part of the main house on paper. The contractor only paints the main portion of the house, unaware that the garage is considered part of the house. The contractor can claim a mistake of fact as they did not have all the facts, leading to a misunderstanding of the contract terms.
- Two parties enter into a contract to dig a hole in a backyard, only to discover later that there is solid rock just below the ground, making it impossible to dig the hole as planned. This is a mutual mistake of fact, as both parties were operating under the mistaken belief that digging the hole was feasible.
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Impossibility
In contract law, the term "impossibility" refers to situations where unforeseen events, beyond the control of either party, occur after the formation of the contract, fundamentally changing the nature of the obligations involved. This defence applies when performing the contract becomes physically or legally impossible, and neither party is at fault.
For example, a painter may not finish painting a home as per their contractual obligation because the house burned down during the project. Here, the defence of impossibility can be invoked, as it was impossible for the painter to fulfil their contractual duties.
Another example would be if a new law comes into effect after a contract is signed, making the performance of that contract illegal. In this case, the party can argue that it was impossible for them to perform due to the change in legislation.
Courts will also consider whether the event that caused the impossibility was contemplated under the contract. If the event was so unusual and unexpected that it could not have been reasonably foreseen, and it is unfair to place the risk of its occurrence on either party, the court may excuse the performance of the contract. On the other hand, if the event was something the parties should have reasonably anticipated, the contract may not be excused.
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Impracticability
In contract law, certain situations may arise where unforeseen events prevent profitability, performance becomes impossible, or there is a misunderstanding about an essential term of the contract. Impracticability is one of the recognized excuses to performance in such cases.
To claim impracticability, it must be established that the party seeking relief did not have control over or was not at fault for the circumstances that made performance impracticable. Additionally, the party must not have assumed the risk of the duties becoming impracticable, either expressly or impliedly. Impracticability is generally only considered in extreme circumstances.
It is worth noting that impracticability is distinct from impossibility, which is another excuse for non-performance. Impossibility applies when performance becomes physically or legally impossible due to events beyond the control of either party. For example, if the sale of certain goods becomes illegal or the subject of the contract is destroyed, impossibility may be claimed.
In summary, impracticability can be an excuse for non-performance in contract law when performance becomes excessively burdensome due to unforeseen circumstances beyond the control of the parties involved, and when the risk of such circumstances was not assumed by the party claiming impracticability.
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Duress
Physical duress involves explicit threats of physical harm or unlawful restraint to force someone into an agreement. This is one of the clearest forms of duress and typically renders a contract voidable. Economic duress occurs when one party exerts unlawful financial pressure, such as threatening to terminate a critical business relationship unless unfavorable contract terms are accepted. It is important to note that economic pressures do not typically constitute duress in contractual situations. Psychological duress is more subtle and involves extreme psychological pressure or manipulation that deprives an individual of free will.
When determining if duress occurred, courts consider multiple factors, including the victim's ability to resist, the immediacy of the threat, the timeframe for contract performance, the bargaining power of each party, and the mental state of each party at the time of the agreement. To prove duress, one must demonstrate wrongful pressure, lack of genuine consent, and no reasonable alternative.
Legal remedies for duress include rescission of the contract and damages. To avoid claims of duress, it is essential to ensure that contracts are negotiated freely, with adequate time for review and legal consultation.
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Frequently asked questions
Some excuses for non-performance in contract law include impossibility, fraud, duress, undue influence, and unconscionability.
Impossibility is when an unforeseen event occurs that is beyond the control of either party, making the performance of the contract physically or legally impossible.
Unconscionability applies to contracts that are excessively one-sided and unjust, typically due to a gross imbalance of power or information between the parties, resulting in the exploitation of the weaker party.
Undue influence refers to situations where an individual may feel pressured into agreeing to terms that are not in their best interests due to manipulation or coercion by another party.
Fraud includes fraudulent misrepresentation or inducement, such as when a party is induced to enter into a contract under false pretenses or based on misleading information.
