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Defenses to
Contract Enforcement

Understand the legal grounds that prevent a contract from being enforced, even when all elements of formation appear to be met.

CPA Regulation (REG)

What Is a Defense to Enforcement?

A defense to contract enforcement is a legal argument that renders an otherwise valid contract unenforceable. Even when offer, acceptance, and consideration exist, certain circumstances can void or rescind the agreement.

Two Categories of Defenses

Void Contracts
The contract has no legal effect from the start. Neither party can enforce it. Courts treat it as if it never existed.
Voidable Contracts
The contract can be enforced, but the injured party has the right to rescind. It is valid unless the injured party chooses to void it.

Why Defenses Matter on the CPA Exam

The REG section frequently tests your ability to distinguish between formation issues and enforcement defenses. You will encounter fact patterns where a contract appears valid on the surface, and you must identify the hidden defense.

1
Identify the defense type: Is the contract void or voidable?
2
Determine who can assert it: Only the injured party can void a voidable contract.
3
Apply the correct remedy: Void = no enforcement. Voidable = rescission or ratification.

The Major Defenses at a Glance

DEFENSES VOID Illegality Adjudicated Insanity VOIDABLE Fraud / Misrepresentation Duress Undue Influence Mutual Mistake Minority (Capacity) UNENFORCEABLE Statute of Frauds Unconscionability

Defense: Lack of Capacity

Certain parties lack the legal ability to enter binding contracts. When capacity is absent, the contract is either void or voidable depending on the type of incapacity.

Minors
Contracts with minors (under 18) are voidable by the minor. The minor may disaffirm at any time before reaching majority or within a reasonable time after. Exception: contracts for necessities (food, shelter, clothing) are enforceable to the extent of their reasonable value.
Intoxication
Voidable if the person was so intoxicated they could not understand the nature of the transaction, AND the other party knew or should have known of the condition.
Mental Incapacity
If adjudicated insane by a court: the contract is void. If not adjudicated but unable to understand: the contract is voidable.

Defense: Fraud and Misrepresentation

Fraud makes a contract voidable by the innocent party. There are two types tested on the CPA exam, and the distinction matters.

Fraud in the Inducement
A party is deceived about the terms or subject matter but knows they are signing a contract. Result: voidable. The innocent party can rescind or sue for damages.
Fraud in the Execution
A party is deceived about the very nature of the document (e.g., told it is a receipt when it is actually a contract). Result: void because there was no real assent.

Defense: Duress and Undue Influence

Duress
Physical duress (threat of violence): contract is void. Economic duress (improper threat exploiting financial pressure): contract is voidable.
Undue Influence
Occurs when a person in a position of trust (fiduciary, caretaker, attorney) uses that relationship to pressure consent. Result: voidable by the influenced party.

Defense: Illegality

A contract with an illegal purpose or one that violates public policy is void from inception. Courts will not enforce it, and generally neither party can recover.

1
Illegal subject matter: Agreements to commit crimes, gambling contracts in states where gambling is illegal, or usurious loan agreements.
2
Restraint of trade: Overly broad non-compete agreements may be struck down as against public policy.
3
Licensing violations: If a statute requires a license for regulatory purposes, an unlicensed party's contract is void. If the license is merely for revenue purposes, it remains enforceable.

Defense: Mistake

Mutual Mistake
Both parties share the same erroneous belief about a material fact existing at the time of the contract. Result: voidable by either party (or void if the mistake goes to the very existence of the subject matter).
Unilateral Mistake
Only one party is mistaken. Generally not a defense unless: (a) the other party knew or should have known of the mistake, or (b) the mistake is so extreme enforcement would be unconscionable.

Defense: Statute of Frauds

Certain contracts must be in writing and signed by the party to be charged to be enforceable. If the writing requirement is not met, the contract is unenforceable (not void: it still exists, but a court will not enforce it).

Defense: Unconscionability

A contract (or clause) is unconscionable if it is so one-sided that enforcement would be unjust. The court determines unconscionability at the time of formation, not at the time of dispute.

Procedural
Relates to the process of forming the contract: hidden terms, unequal bargaining power, lack of meaningful choice, deceptive fine print.
Substantive
Relates to the terms themselves: grossly unfair price, one-sided penalty clauses, unreasonable limitation of remedies.

Void vs Voidable: Key Distinction

Void Voidable
Legal Status No contract exists Valid until rescinded
Who Can Assert Either party / court Injured party only
Ratification Cannot be ratified Can be ratified
Third-Party Rights No rights transferred Bona Fide Purchaser (BFP) may retain rights
Examples Illegality, physical duress, fraud in execution Minors, fraud in inducement, economic duress

How to Analyze a Defense Question

1
Check formation first: Is there offer, acceptance, and consideration? If a core element of formation is missing, you do not need a defense.
2
Identify the defense category: Is the issue about capacity, consent (fraud, duress, mistake), legality, or formality (Statute of Frauds)?
3
Classify as void or voidable: This determines the available remedies and who can assert the defense.
4
Check for exceptions: Has the defense been waived? Was the contract ratified? Did the minor reach majority and continue to perform?
5
Apply to the answer choices: Eliminate choices that name the wrong defense category or misclassify void/voidable.

Example 1: The Minor's Purchase

1
Formation: Offer, acceptance, and consideration all present. The contract appears valid.
2
Defense: Alex is a minor. A minor's contract is voidable by the minor.
3
Result: Alex can disaffirm the contract and return the car. In most jurisdictions, Alex is entitled to a refund (the duty to return is limited to what remains).

Example 2: Fraud in the Inducement

1
Material misrepresentation: "No history of flooding" is a false statement of material fact.
2
Scienter: Seller knew the statement was false.
3
Justifiable reliance: Buyer relied on the statement when deciding to purchase.
4
Result: Contract is voidable by Buyer. Buyer can rescind or sue for damages.

Example 3: The Statute of Frauds

1
Formation: Offer, acceptance, and consideration exist. Formation is complete.
2
Defense: This is a contract for the sale of land, which falls under the Statute of Frauds.
3
Writing requirement: No signed writing exists. Bob can raise the Statute of Frauds as a defense.
4
Result: The contract is unenforceable. Carol cannot compel Bob to sell, absent an exception (like part performance).

Common Mistakes to Avoid

✕ Confusing Void and Voidable
A minor's contract is voidable, not void. The minor can choose to enforce it. Only the minor can disaffirm: the adult party cannot.
✕ Forgetting Fraud Types
Fraud in the inducement makes a contract voidable. Fraud in the execution makes it void. Mixing these up flips the correct answer.
✕ Statute of Frauds = Void
A contract failing the Statute of Frauds is unenforceable, not void. It can become enforceable if later reduced to writing or through part performance.

Summary: Defenses at a Glance

Defense Effect Who Asserts
Illegality Void Either party / Court
Physical Duress Void Either party
Fraud in Execution Void Deceived party
Adjudicated Insanity Void Either party
Minority Voidable Minor only
Fraud in Inducement Voidable Innocent party
Economic Duress Voidable Coerced party
Undue Influence Voidable Influenced party
Mutual Mistake Voidable Either party
Statute of Frauds Unenforceable Party to be charged
Unconscionability Unenforceable Court determination

Question 1 of 5

A 16-year-old purchases a laptop computer for personal entertainment. Two weeks later, the minor wants to return it and get a full refund. Which of the following is most accurate?

Question 2 of 5

Seller intentionally tells Buyer that a parcel of land contains 50 acres when Seller knows it only contains 30 acres. Buyer relies on this statement and signs the purchase agreement. The contract is:

Question 3 of 5

Tom orally agrees to work for XYZ Corp as an accountant for two years starting immediately. After six months, XYZ fires Tom. Tom sues for breach. XYZ's best defense is:

Question 4 of 5

A person who has been adjudicated mentally incompetent by a court signs a contract to purchase a vehicle. The contract is:

Question 5 of 5

Davis's strongest defense to enforcement of this contract is: