3.4 Implied-in-Fact Contracts & Quasi-Contract

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1 Introduction & FYLSE Examination Guide

1.1 FYLSE Exam Structure, Passing Standard & Administration 1.2 Study Method, Pacing & MBE-Style Technique

2 Contracts: Mutual Assent, Capacity & Contract Formation

2.1 The Offer & Objective Theory of Assent 2.2 Termination & Irrevocability of Offers 2.3 Acceptance & the Mailbox Rule 2.4 Mirror Image Rule & UCC 2-207 Battle of the Forms 2.5 Mistake in Contract Formation 2.6 Fraud, Duress, Undue Influence & Illegality 2.7 Capacity to Contract

3 Contracts: Consideration, Estoppel & Implied Obligations

3.1 Consideration & the Bargained-For Exchange 3.2 Past & Moral Consideration, Pre-Existing Duty & Modification 3.3 Promissory Estoppel & Detrimental Reliance 3.4 Implied-in-Fact Contracts & Quasi-Contract 3.5 Implied Covenant of Good Faith, Fair Dealing & Indefinite Terms

4 Contracts: Third-Party Beneficiaries, Assignment & Delegation

4.1 Third-Party Beneficiary Contracts 4.2 Assignment of Rights 4.3 Delegation of Duties

5 Contracts: Statute of Frauds, Parol Evidence & Interpretation

5.1 Statute of Frauds: Contracts Within the Statute 5.2 Satisfying the Statute: Writing, Signature & Exceptions 5.3 The Parol Evidence Rule 5.4 Contract Interpretation & Canons of Construction

6 Contracts: Performance, Conditions, UCC Warranties & Breach

6.1 Conditions: Express, Constructive & Excuse 6.2 Substantial Performance vs. Perfect Tender 6.3 Cure, Rejection, Revocation & Installment Contracts 6.4 UCC Article 2 Warranties & Risk of Loss 6.5 Anticipatory Repudiation & Insecurity

7 Contracts: Remedies, Discharge & Changed Circumstances

7.1 Expectation Damages & Their Limitations 7.2 Reliance, Restitution & Liquidated Damages 7.3 Specific Performance & Injunctive Relief 7.4 UCC Article 2 Buyer's and Seller's Remedies 7.5 Impossibility, Impracticability & Frustration of Purpose 7.6 Discharge by Agreement: Rescission, Novation & Accord and Satisfaction

8 Criminal Law: Principles of Criminal Liability & Mens Rea

8.1 Actus Reus, Voluntary Acts & Omissions 8.2 Criminal Causation & Intervening Causes 8.3 Common Law & Model Penal Code Mens Rea 8.4 Mistake of Fact, Mistake of Law & Concurrence

9 Criminal Law: Inchoate Offenses & Accomplice Liability

9.1 Criminal Attempt & Impossibility 9.2 Solicitation & the Merger Doctrine 9.3 Conspiracy & Merger Doctrine 9.4 Accomplice Liability: Actus Reus & Mens Rea 9.5 Scope of Accomplice Liability, Withdrawal & Parties to Crime

10 Criminal Law: Homicide & Crimes Against the Person

10.1 Common Law Murder & Malice Aforethought 10.2 Degrees of Murder, Premeditation & Deliberation 10.3 The Felony Murder Rule & Its Limitations 10.4 Voluntary & Involuntary Manslaughter 10.5 Non-Homicide Crimes Against the Person

11 Criminal Law: Property Crimes, Theft & Habitation

11.1 Common Law Larceny 11.2 Embezzlement & False Pretenses 11.3 Robbery & Extortion 11.4 Receiving Stolen Property 11.5 Burglary 11.6 Arson

12 Criminal Law: Defenses: Capacity, Justification & Excuse

12.1 Insanity: The Four Legal Tests 12.2 Intoxication, Diminished Capacity & Infancy 12.3 Self-Defense & Defense of Others 12.4 Defense of Property, Habitation & Law Enforcement Privileges 12.5 Duress & Necessity 12.6 Entrapment & Mistake as an Excuse

13 Torts: Intentional Torts to Persons & Property

13.1 Intent, Motive & Incapacity in Intentional Torts 13.2 Transferred Intent 13.3 Battery & Assault 13.4 False Imprisonment 13.5 Trespass to Land 13.6 Trespass to Chattels & Conversion

14 Torts: Privileges & Defenses to Intentional Torts

14.1 Consent: Express, Implied & Capacity 14.2 Exceeding & Vitiating Consent 14.3 Self-Defense & Defense of Others (Tort) 14.4 Defense of Property & Recapture of Chattels 14.5 Public & Private Necessity 14.6 The Shopkeeper's Privilege

15 Torts: Negligence — Duty of Care & Breach

15.1 Duty of Care & the Foreseeable Plaintiff 15.2 Affirmative Duties to Act & Special Relationships 15.3 Standard of Care: The Reasonable Person & Children 15.4 Professional Negligence, Informed Consent & Negligence Per Se 15.5 Land Possessor Liability & Premises Duties 15.6 Breach of Duty & Res Ipsa Loquitur

16 Torts: Causation, Defenses, Multiple Tortfeasors, Wrongful Death & Damages

16.1 Cause in Fact & Multiple Actors 16.2 Proximate Cause & Intervening Forces 16.3 Contributory, Comparative Negligence & Assumption of Risk 16.4 Joint and Several Liability, Contribution & Indemnity 16.5 Vicarious Liability & Non-Delegable Duties 16.6 Wrongful Death & Survival Actions 16.7 Statute of Limitations & Claim Accrual 16.8 Tort Damages: Compensatory, Nominal, Punitive & Mitigation

17 Torts: Strict Liability & Products Liability

17.1 Strict Liability for Animals 17.2 Abnormally Dangerous Activities & Scope of Risk 17.3 Strict Products Liability & Defect Categories 17.4 Products Liability Under Negligence, Warranty & Misrepresentation 17.5 Defenses to Products Liability

18 Torts: Emotional Distress, Defamation, Privacy & Economic Torts

18.1 Intentional Infliction of Emotional Distress 18.2 Negligent Infliction of Emotional Distress 18.3 Common Law Defamation: Elements, Libel & Slander 18.4 Constitutional Limits, Privileges & Defenses to Defamation 18.5 Invasion of Privacy 18.6 Nuisance & Economic Torts

3.4 Implied-in-Fact Contracts & Quasi-Contract

Key Takeaways Explain This Topic AI

A contract implied in fact is a real contract whose mutual assent is inferred from conduct and circumstances rather than words.

A quasi-contract, or contract implied in law, is not a contract at all but a restitutionary remedy preventing unjust enrichment.

Quasi-contractual recovery requires a benefit conferred, appreciation or knowledge by the recipient, and inequity in retaining it without payment.

Recovery is measured by the reasonable value of the benefit conferred, often described as quantum meruit, not by any contract price.

An officious intermeddler who confers a benefit without request recovers nothing, though a professional who renders emergency aid may recover reasonable value.

Last updated: September 2026

Implied-in-Fact Contracts & Quasi-Contract
Contracts Implied in Fact

Contracts are categorized by the method of their formation. It is vital not to confuse a contract implied in fact with a contract implied in law.

Definition and Elements

A contract implied in fact is an actual, true contract formed by the conduct of the parties rather than by explicit oral or written words. Under Restatement (Second) § 4 , a promise may be stated in words or may be inferred wholly or partly from conduct.

To establish a contract implied in fact, the plaintiff must prove:

Performance of Services: The plaintiff furnished services, property, or goods to the defendant under circumstances indicating that compensation was expected;

Defendant's Knowledge: The defendant knew or had reason to know that the plaintiff expected compensation;

Voluntary Acceptance / Opportunity to Reject: The defendant accepted the benefit with an opportunity to decline or object, knowing compensation was expected;

Tacit Mutual Assent: A reasonable person observing the parties' objective conduct would infer an intention to enter into a binding agreement.

Classic Everyday Examples

The Barber Chair: You walk into a barbershop, sit in the barber's chair, and nod when the barber raises scissors. No price or words are exchanged. When the haircut is finished, an implied-in-fact contract exists; you are legally bound to pay the customary posted price.

The Restaurant Order: Ordering dinner at an upscale restaurant where prices for daily specials are not listed creates an implied-in-fact contract to pay the reasonable market price.

Entertainment Idea Submissions ( Desny v. Wilder ): In California, submitting a screen idea or treatment to a studio executive under industry custom where ideas are pitched with the mutual understanding that payment will follow if the idea is used gives rise to an implied-in-fact contract.

Contracts Implied in Law (Quasi-Contract / Quantum Meruit)

A contract implied in law (or quasi-contract ) is not a contract at all . It is a legal fiction created by the courts of equity to prevent unjust enrichment . No mutual assent, offer, acceptance, or promissory intent is required.

The Four Core Elements of Quasi-Contract

To recover in quasi-contract, the plaintiff must establish:

Measurable Benefit Conferred: The plaintiff conferred a tangible, measurable economic benefit upon the defendant;

Reasonable Expectation of Compensation: The plaintiff conferred the benefit with the reasonable expectation of being paid (i.e., not intending a gift or acting gratuitously);

Defendant's Appreciation & Retention: The defendant knew of or appreciated the benefit and retained it;

Unjust Retention: Under the circumstances, it would be fundamentally inequitable and unjust for the defendant to retain the benefit without paying for its fair value.

The Measure of Recovery: Quantum Meruit

Damages in quasi-contract are restitutionary :

Quantum Meruit: "As much as he deserved"—the reasonable market value of the services rendered.

Quantum Valebant: "As much as they were worth"—the reasonable market value of goods provided.

Crucial Rule: Recovery is measured by the reasonable market value of the benefit conferred onto the defendant , NOT by the plaintiff's lost profits, subjective valuation, or expectation interest.

The Officious Intermeddler vs. Emergency Medical Aid

The most tested distinction in quasi-contract on the FYLSE is the clash between the officious intermeddler and the emergency aid exception .

The Officious Intermeddler Doctrine

An officious intermeddler (or volunteer) is an individual who thrusts an unrequested benefit upon another without their consent, without an emergency, and without giving the recipient an opportunity to refuse. The officious intermeddler cannot recover in quasi-contract.

Example: While you are at work, an enterprising landscaper rakes your yard, trims your trees, and plants prize roses without your knowledge. When you arrive home, the landscaper demands $500 for services rendered. Even though your property value increased, you owe nothing. The landscaper acted officiously, denying you the opportunity to reject the work.

The Emergency Medical Aid Exception

Under Restatement (Third) of Restitution and Unjust Enrichment § 20 , an important exception to the requirement of prior consent exists for emergency medical services rendered to an incapacitated person:

The plaintiff is a licensed medical professional (physician, paramedic, hospital);
The defendant was incapacitated or unconscious , rendering consent impossible;
The treatment was necessary to preserve life or health ;
The professional had no reason to believe the recipient would decline;

The services were provided professionally , creating a standard presumption against gratuitous aid.

Under this exception, the law presumes that a reasonable person would have requested life-saving treatment, permitting the physician or hospital to recover the reasonable value of emergency services in quantum meruit.

Comparison: Contract Types & Non-Contractual Remedies

Dimension Express Contract Contract Implied in Fact Promissory Estoppel Quasi-Contract (Implied in Law)

Source of Duty Explicit words (written or oral) Non-verbal conduct manifesting assent Promise inducing detrimental reliance Equitable duty preventing unjust enrichment

Mutual Assent? Yes (Expressed) Yes (Inferred from conduct) No (Unilateral promise without bargain) No (Legal fiction; no consent)

Consideration? Yes Yes No (Reliance substitutes for consideration) No

Standard Remedy Expectation damages (Contract price) Expectation damages (Reasonable price/custom) Reliance damages (Out-of-pocket costs) Restitution / Quantum Meruit (Value of benefit)

Governing Law Common Law / UCC Common Law / UCC Restatement (Second) § 90 Law of Restitution & Equity
FYLSE Exam Scenarios & Doctrinal Traps
Scenario 1: The Paving Error (Constructive Knowledge vs. Absence)

Hypothetical: Driveway Paving Co. mistakenly believes it has a contract to pave Lot 12, which belongs to Brown. Paving Co. shows up at Lot 12 with heavy equipment and begins paving. Brown is sitting on the front porch with a cup of coffee, realizes the crew is paving the wrong driveway, but says nothing because Brown's old gravel driveway needed work. After the job is completed, Paving Co. discovers its clerical error and demands payment. Analysis: Brown is liable in quasi-contract for the reasonable value of the paving. Although there was no express or implied-in-fact contract, Brown had full knowledge of the work, possessed an immediate opportunity to speak up and stop the crew, but silently retained the benefit. Retention without payment is unjust. Trap Variation: If Brown had been away on vacation in Europe and returned to find a freshly paved driveway, Brown would NOT be liable in quasi-contract. Brown had no knowledge of the work and no opportunity to refuse the benefit.