What kind of common mistake can make a contract void?

Asked by: Asha Ward  |  Last update: January 2, 2026
Score: 4.9/5 (51 votes)

A mutual mistake occurs when the parties to a contract are both mistaken about the same material fact within their contract. They are at cross purposes. There is a meeting of the minds, but the parties are mistaken. Hence the contract is voidable.

What mistake renders a contract void?

The mistake will render the contract void if it robs it of all substance. Mutual mistake (where the parties are at cross-purposes with one another). If, from the parties' words and conduct, only one possible interpretation of what was agreed can be deduced, the contract will still be valid. Otherwise it will be void.

What are 3 things that can cause a contract to be void?

What Makes A Contract Null And Void
  • Uncertainty or Ambiguity. ...
  • Lack of Legal Capacity. ...
  • Incomplete Terms. ...
  • Misrepresentation or Fraud. ...
  • Common Mistake. ...
  • Duress or Undue Influence. ...
  • Public Policy or Illegal Activity.

Can a contract be voided because of a mistake?

If both contracting parties make a mistake regarding facts considered to be material, the party that is negatively affected may get out of the contract. This will typically arise when there is a lack of existence of the subject matter. Mutual mistake can either result in a void or voidable contract.

What types of mistakes will allow rescission of a contract?

The court must find a valid legal basis for rescinding the contract, such as misrepresentation, mistake, duress, undue influence, incapacity, or illegality. Rescission by court order is subject to judicial discretion and equitable principles.

What makes your Contract void or voidable

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How to legally rescind a contract?

Subject to Section 1693, to effect a rescission a party to the contract must, promptly upon discovering the facts which entitle him to rescind if he is free from duress, menace, undue influence or disability and is aware of his right to rescind: (a) Give notice of rescission to the party as to whom he rescinds; and (b) ...

How can a mistake invalidate a contract?

A mutual mistake negates consent and therefore no agreement is said to have been formed at all. A unilateral mistake is where only one party is mistaken and the other party knows about it and takes advantage of the error. A unilateral mistake also negates consent and the existence of an agreement.

What grounds make a contract null and void?

A null contract is one that was never valid from the beginning, while a void contract becomes invalid due to certain circumstances, such as illegal provisions or the incapacity of one party. Consequently, such contracts are not legally binding and cannot be enforced.

What is the single mistake rule?

If only one party is mistaken, the mistake is a “unilateral mistake” of law. One may rescind for a unilateral mistake of law only if the other party knows of, but does not correct, and takes advantage of or unfairly obtain the benefit of the rescinding party's mistake of law.

What is an example of a common mistake in contract law?

An example would be a purchase for a famous footballer's boots which have been signed them, if it was believed to be of this quality at the time of contracting, and then subsequently came to light that they were not actually the footballer's boots, this would be a mistake as to the quality of the subject matter.

How to legally void a contract?

How to void a contract
  1. Prove its invalidity.
  2. Use capacity to end it.
  3. Agree to mutually void it.
  4. Exercise the “cooling off” rule.
  5. Use the terms of a voidable contract.

What makes a contract legally invalid?

If the subject matter is illegal, the contract will not be valid. All terms of your contract must not contravene any federal or state law. If the formation or performance of the contract will require a party to break the law, the contract is invalid.

What automatically voids a contract?

Fraud or Misrepresentation: If either party lies or misrepresents facts during the formation of the contract, the court might consider the contract null and void. Coercion or Undue Influence: A contract is invalid if one party forces or pressures the other to enter it. This includes threats or misuse of power.

What must be misrepresented in a contract to void it?

What Makes a Contract Null and Void? A legal misrepresentation consists of false statements of information for which the information involved is critical to the contract and the verbal or non-verbal indications influence another person or business to enter into the agreement.

What is a fundamental mistake?

Fundamental error is when someone makes a mistake that goes against what is true or real. It can be a mistake about something important in a contract or a mistake made by a judge in a court case. Sometimes, these mistakes can be fixed, but other times they can't.

What renders a contract invalid?

Contracts can be rendered invalid if one of the parties was coerced or manipulated into signing the agreement. This is known as duress or undue influence. Duress involves physical or mental threats, while undue influence happens when someone pressures or manipulates another person into an agreement against their will.

What type of mistake will allow rescission of a contract?

Civil Code § 1689(b). An agreement may be rescinded if the rescinding party's consent is based on a mistake or misunderstanding of facts or law and the other party either shares the misunderstanding or contributes to it by misrepresentation, even if innocently.

What is a common mistake?

A common mistake is the circumstance where all parties to a contract are “mistaken” regarding a fundamental matter of fact. If both parties are under the same misapprehension (e.g. the existence of goods under a sale of contract) it may render the contract void at law or, in some circumstances, voidable in equity.

What is the honest and reasonable mistake rule?

To raise the defence of honest and reasonable mistake of fact there must be evidence of the following: Your mistake was an honest one; Your belief forming the basis of your mistake must have been a reasonable belief to have held in the circumstances; The mistake must be one relating to fact and not law.

When can a contract be declared void?

Void contracts can occur when one of the parties can be found incapable of fully comprehending the implications of the agreement, like when a person has intellectual disabilities or is inebriated. Agreements involving minors or illegal activities are also generally void.

How to void a contract under duress?

When one individual coerces the other into signing under duress, they must contact an attorney. The lawyer will help to invalidate the contract and ensure that the party is not penalized for a breach of contract as long as duress exists.

What are two factors that can make a contract void?

These are some of the most common reasons:
  • The subject of the contract is illegal. ...
  • The terms are vague or impossible to fulfill. ...
  • Lack of consideration. ...
  • Fraud.

What mistakes make a contract voidable?

A voidable contract is a formal agreement between two parties that may be rendered unenforceable for any number of legal reasons, which may include:
  • Failure by one or both parties to disclose a material fact.
  • A mistake, misrepresentation, or fraud.
  • Undue influence or duress.

What is a Scrivener error?

Scrivener's error is a mistake made by someone who is writing or copying something down, like a typo or a misspelling. It is a type of clerical error, which means it is not a mistake made by a judge or based on legal reasoning. Scrivener's errors can be corrected at any time, even after a judgment has been made.

What type of mistake will serve as a valid defense to a contract?

Mistakes can also be either unilateral or mutual. A unilateral mistake is when only one of the contracting parties makes a mistake. The contract is usually still valid and legally enforceable, unless the mistake is a palpable unilateral mistake.