Other Quasi-contracts

Nature and Function

Quasi-contracts arise from lawful, voluntary, and unilateral acts that create juridical relations by operation of law. The obligation is imposed to prevent one person from being unjustly enriched or benefited at the expense of another.

The class called other quasi-contracts covers statutory and analogous situations not treated as negotiorum gestio or solutio indebiti. The common result is restitution, reimbursement, compensation, co-ownership, or contribution when a benefit has been conferred, preserved, or forced upon a person under circumstances that make retention inequitable.

The obligation does not rest on consent. It is not a contract implied from the parties' agreement, but an obligation created by law because a person received a measurable advantage without a sufficient juridical reason to keep it without paying, returning, sharing, or accounting for it.

Unjust Enrichment as the Unifying Principle

The Civil Code principle against unjust enrichment supplies the organizing rule for both named and unnamed quasi-contracts. A person may not retain money, property, services, savings, or other benefits when the law regards the retention as without just cause.

An unjust-enrichment claim generally requires enrichment of the defendant, impoverishment or expenditure by the claimant, a connection between the enrichment and the impoverishment, absence of a valid legal ground for the benefit, and lack of another adequate legal remedy governing the same situation.

Enrichment may consist of acquiring property, avoiding an expense, discharging a debt, preserving property from loss, receiving necessary services, or enjoying a project paid for by others. Impoverishment may consist of payment, labor, delivery of goods, assumption of expenses, or loss of an opportunity to use one's resources.

A benefit is not unjust when it is supported by a valid contract, law, judgment, donation, waiver, natural obligation voluntarily performed, or another recognized legal cause. Quasi-contract cannot be used to rewrite an express agreement or to recover what a party voluntarily gave as a gratuity.

The remedy is restorative, not punitive. Recovery is ordinarily measured by the value of the benefit retained, the reasonable expense incurred, or the specific statutory measure supplied by the governing rule, but the claimant should not obtain more than equity and law allow.

Distinctions from Related Sources of Obligations

The distinction matters because quasi-contract focuses on the defendant's retention of a benefit without just cause, while tort and quasi-delict focus on wrongful injury. A single factual setting may contain both benefit and injury, but recovery must follow the source of obligation that directly governs the claim.

Support Furnished by a Third Person

When a stranger furnishes support without the knowledge of the person legally obliged to give support, the stranger may claim reimbursement from the legal obligor. The rule prevents the obligor from escaping a family-law duty merely because another person supplied the necessities first.

The right to reimbursement is denied when the circumstances show that the support was given out of piety, charity, or generosity without intent to be repaid. Intent is inferred from the relation of the parties, the surrounding circumstances, the nature of the expenses, prior demands, receipts, and the conduct of the giver after furnishing support.

Support refers to necessities appropriate to the recipient's condition, including food, dwelling, clothing, medical attendance, education, and transportation insofar as they are legally included in support. Reimbursement is limited to reasonable and necessary expenses, not luxuries or voluntary enhancements unrelated to the legal duty of support.

The claim is directed against the person legally bound to support, not against the needy recipient merely because the recipient received the benefit. The law treats the enrichment as the obligor's saving of a legally chargeable expense.

Support After Unjust Refusal

When the person obliged to support an orphan, insane person, indigent person, or minor child unjustly refuses to do so, a third person who furnishes support may recover from the defaulting obligor. The refusal supplies the inequitable element because the obligor's legal duty has already become demandable.

Reimbursement requires proof of the legal duty to support, the need of the recipient, the obligor's unjust refusal or failure, the claimant's furnishing of support, and the reasonableness of the amount claimed. The rule does not reward officious interference where adequate support was already being furnished by the person legally bound.

Funeral Expenses Paid by a Third Person

When funeral expenses are borne by a third person without the knowledge of the relatives who were obliged to give support to the deceased, those relatives must reimburse the third person upon claim. The obligation follows from the family duty connected with support and from the benefit of discharging an expense that the relatives should have borne.

The reimbursable amount must be reasonable in light of the deceased's circumstances, local usage, and the family's condition. Extravagant expenditures, ceremonial additions, or expenses incurred as a personal gesture may be reduced or excluded when they exceed what the law treats as chargeable funeral expense.

The claimant must show that the expense was actually paid, that the persons sued were legally bound in the order recognized by law, and that payment was not intended as a donation or gratuitous act. Reimbursement is not defeated merely because the relatives did not expressly authorize the burial expense if the law imposed the underlying duty.

Emergency Treatment and Aid

When a person, through accident or other cause, is injured or becomes seriously ill and is treated or helped while not in a condition to give consent to a contract, that person is liable to pay for the services of the physician or other person who aided him. The law supplies the obligation because immediate aid may be necessary when consent cannot be obtained.

The rule covers necessary medical care, urgent assistance, and other reasonable services directly connected with the emergency. It is enough that the person aided was not then capable of contracting or meaningfully consenting, and that the aid conferred an objectively necessary or useful benefit.

No recovery is allowed when the services were rendered out of pure generosity. The amount recoverable is the reasonable value of the services, medicines, materials, or expenses proved, subject to reduction when the aid was unnecessary, excessive, unrelated to the emergency, or rendered in a negligent manner that independently caused injury.

Property Saved During Calamity

When property is saved from destruction during fire, flood, storm, or other calamity by another person without the owner's knowledge, the owner must pay just compensation. The juridical basis is preservation of property under circumstances where prior authorization is impracticable.

The rescuer must show an actual calamity or imminent danger, a voluntary act of preservation, lack of prior contractual authority, and benefit to the owner. The owner's enrichment consists in the saving of the property or the reduction of the loss that would otherwise have occurred.

Just compensation is not automatically equal to the value of the property saved. It is measured by the nature of the risk, effort, expense, skill, time, and value of the benefit, while avoiding a windfall to a person who acted without a contractual undertaking.

If the owner requested the service in advance, the claim may instead be contractual. If the rescuer caused damage by negligence or bad faith, the right to compensation may be reduced or defeated and separate liability may arise.

Government Work for Health or Safety

When the government undertakes necessary work because a person failed to comply with health or safety regulations concerning property, the property owner or responsible person is liable for the expenses even if he objected. Consent is immaterial because the duty arises from law and the public character of the regulation.

The recoverable expenses must be connected with an authorized regulation, actual noncompliance, necessary work, and reasonable cost. Examples include abatement, repair, clearing, securing, or sanitation measures required to remove a hazard or enforce a valid safety requirement.

This quasi-contractual liability does not substitute for administrative fines, criminal penalties, or other sanctions when those are separately authorized. It simply prevents the responsible person from shifting the cost of compliance to the public.

Accidental Confusion or Commingling of Movables

When movables separately belonging to two or more persons are commingled or confused by accident or fortuitous event, the rules on co-ownership govern. The law avoids arbitrary forfeiture when separation is impossible or impracticable and no party is at fault.

Each owner retains an ideal share proportionate to his contribution, value, quantity, or other provable measure. Co-ownership permits accounting, partition, sale, or division of proceeds when physical separation cannot fairly restore each original movable.

The rule applies only where the commingling is accidental or fortuitous. If one person intentionally, fraudulently, or negligently causes the confusion, the consequences may be governed by property rules on accession, liability for damages, or bad-faith principles instead of neutral co-ownership.

Finder of Lost Personal Property

The rights and duties of the finder of lost personal property are treated as a quasi-contractual situation because the finder voluntarily acquires custody of a thing belonging to another without a contract. The finder must return the thing to its previous possessor if known, or deposit it with the proper local authority if the owner or possessor is unknown.

The finder is not an owner by mere finding. Custody carries duties similar to deposit, including preservation of the thing and delivery to the person legally entitled to it or to the public officer designated by law.

If the thing cannot be kept without deterioration or without expenses that would substantially reduce its value, sale under the legal procedure may be proper and the proceeds take the place of the thing. If the owner appears within the period fixed by law, the owner recovers the thing or proceeds but must pay the statutory reward and proper expenses.

If no owner appears within the legal period after the required public notice, the thing or its value may be awarded to the finder under the governing rules. The reward system balances the owner's right to recover with the policy of encouraging honest delivery of lost movables.

Possessor in Good Faith and Expenses on Property

The right of a possessor in good faith to reimbursement for necessary and useful expenses is also connected with quasi-contract. The owner benefits from preservation or improvement of property, while the possessor acted under a belief of lawful possession.

Necessary expenses are those required for preservation of the property. They are generally reimbursable because the owner would have had to incur them to prevent loss or deterioration.

Useful expenses increase the value or productivity of the property. A possessor in good faith may demand reimbursement under the property rules, and the owner may be allowed to choose between paying the amount spent or the increase in value, depending on the governing rule.

The possessor in good faith may have a right of retention until proper reimbursement is made when the Civil Code so provides. This retention is a security for reimbursement and not a transfer of ownership.

Luxury or ornamental expenses are treated differently because they are not necessary for preservation and may not be essential to the owner's enrichment. The possessor may generally remove improvements made for pleasure or ornament if removal causes no substantial damage and the owner does not elect to pay for them.

Payment of Another's Debt Without the Debtor's Knowledge

When a third person pays a debt without the debtor's knowledge, the payer's rights are governed by the rules on payment by a third person. The situation is quasi-contractual because the debtor's obligation has been extinguished or reduced without a prior agreement with the payer.

If the payment benefited the debtor, the payer may recover to the extent of the benefit. This prevents the debtor from retaining the advantage of a discharged debt while also protecting the debtor from unauthorized acts that were useless, excessive, or prejudicial.

Payment with the debtor's consent generally gives the payer stronger rights, including reimbursement and possible subrogation when the law or agreement allows it. Payment without the debtor's knowledge or against the debtor's will is more limited and ordinarily does not give the payer all the creditor's remedies unless a separate legal basis exists.

The claimant must prove the existence of the debt, actual payment, lack of gratuitous intent, benefit to the debtor, and the amount properly chargeable. A payment made as a volunteer for reasons unrelated to the debtor's benefit may be unrecoverable.

Community Measures Against Danger

When a majority of the inhabitants of age in a small community decide on a measure for protection against lawlessness, fire, flood, storm, or other calamity, an inhabitant who objects and refuses to contribute but is benefited by the project must pay his share of the expenses. The rule treats the benefit received from collective protection as a basis for contribution.

The measure must be protective, community-based, reasonably adopted, and actually beneficial to the refusing inhabitant. Liability is not based on political consent but on prevention of free riding when a person accepts the advantage of a protective project funded by others.

The share chargeable must be reasonable and proportionate. A person should not be compelled to pay for unnecessary, extravagant, unrelated, or purely private improvements merely because the project was favored by others.

Taxes Paid for Another

A person who is constrained to pay the taxes of another is entitled to reimbursement from the person legally chargeable with the taxes. The payer's enrichment claim arises because the taxpayer's public obligation was satisfied by another's payment.

Constraint may arise from legal compulsion, protection of one's property interest, avoidance of sale or penalty affecting the payer, or circumstances making payment reasonably necessary. A mere volunteer who pays without necessity, compulsion, or protectable interest may fail to recover if the payment was gratuitous or officious.

Reimbursement covers the amount properly paid for the taxpayer's obligation, subject to proof that the tax was due, that the claimant paid it, and that the defendant was the person legally benefited. Separate issues involving illegal assessments, refunds, or tax remedies remain governed by tax law.

Subsidiary and Limiting Principles

Quasi-contract is generally unavailable when the same parties and benefit are governed by an express contract. A party cannot abandon a bad bargain and repackage the claim as unjust enrichment when the contract validly allocates the risk, price, and remedy.

The remedy is likewise displaced when a specific statute, property rule, succession rule, tax remedy, trust, agency, delict, quasi-delict, or procedural remedy directly governs the situation. The specific rule controls over a general appeal to equity.

Bad faith, illegality, officiousness, and gratuitous intent may defeat or reduce recovery. The law does not assist a claimant who knowingly violates law, imposes unwanted benefits without necessity, or later demands payment for what was clearly intended as a gift.

Reasonableness is central in reimbursement claims. Courts may examine necessity, proportionality, actual benefit, receipts, customary value, available alternatives, and whether the claimant acted promptly and honestly.

Actions based on quasi-contract prescribe under the period fixed for obligations of that class, counted from the time the obligation to reimburse, return, or compensate becomes demandable. Demand, refusal, discovery of the enrichment, and completion of the act may affect accrual depending on the governing rule.

Remedies and Effects

The primary remedies in other quasi-contracts are return of the thing, reimbursement of money paid, payment of reasonable value for services, contribution to expenses, accounting of benefits, recognition of co-ownership, statutory reward, or retention until reimbursement when the governing property rule grants it.

Interest may be recoverable when money becomes due and the obligor is in delay, subject to the ordinary rules on monetary obligations. Damages beyond restitution require an independent basis such as bad faith, negligence, breach of a separate duty, or another source of civil liability.

The claimant bears the burden of proving the benefit conferred, the legal or equitable reason for charging the defendant, the amount recoverable, and the absence of a controlling justification for the defendant's retention of the benefit. The defendant may show contract, donation, waiver, lack of benefit, excessiveness, illegality, prescription, or an adequate alternative remedy.