The classification of the sources of obligations under the Civil Code is a high-yield topic in the 2026 Bar Examinations. Essay questions routinely require examinees to classify a given set of facts into one or more of the five sources, cite the precise codal basis, distinguish overlapping sources, and determine the governing rules on liability, remedies, and defenses. Mastery of this topic enables precise, well-organized answers that directly address the examiner’s call for codal application and doctrinal distinctions.

Core Legal Basis and Definition

Article 1156 of the Civil Code defines an obligation as a juridical necessity to give, to do or not to do.

Article 1157 enumerates the exclusive sources of obligations:

Law;
Contracts;
Quasi-contracts;
Acts or omissions punished by law; and
Quasi-delicts.

No obligation may arise from a source not listed in Article 1157. Each source carries its own governing rules, effects, and remedies.

Essential Requisites / Elements / Components

Obligations Arising from Law (ex lege)

Must be expressly determined in the Civil Code or in special laws (Art. 1158).
Not presumed; courts cannot create obligations by implication or analogy.
Demandable and regulated by the specific precepts of the law that creates them.
Common examples: obligation to pay taxes, obligation to give support (Family Code), obligation to pay legal interest in specified cases.

Obligations Arising from Contracts (ex contractu)

Require a valid, perfected contract (consent, object, and cause under Art. 1318).
Produce the force of law between the contracting parties (Art. 1159).
Must be complied with in good faith; breach triggers remedies under Articles 1170–1178 (specific performance, rescission, or damages).
Autonomy of will and mutuality (Arts. 1308, 1309) are inherent.

Obligations Arising from Quasi-contracts (ex quasi-contractu)

Arise without any agreement or consent of the parties.
Grounded on equity to prevent unjust enrichment.
Primarily governed by negotiorum gestio (Arts. 2144–2153) and solutio indebiti (Arts. 2154–2163), plus other quasi-contracts (Arts. 2164–2175).
Key feature: a benefit is conferred or a loss is avoided under circumstances where retention or non-reimbursement would be unjust.

Obligations Arising from Delicts (ex delicto)

Require the commission of an act or omission punished by law (felony under the Revised Penal Code or special penal laws).
Civil liability is concurrent with criminal liability (RPC Art. 100).
Primarily governed by penal laws; the Civil Code supplies rules on damages (Art. 1161, in relation to Art. 2177 and Title XVIII).
Proof of criminal liability (beyond reasonable doubt) is generally a prerequisite for the civil action ex delicto.

Obligations Arising from Quasi-delicts (ex quasi-delicto)

Require: (1) an act or omission; (2) fault or negligence; (3) damage or injury; (4) proximate causal connection; and (5) absence of any pre-existing contractual relation between the parties (Art. 2176).
Also known as culpa aquiliana or tort.
Governed by Articles 2176–2194 (including vicarious liability under Art. 2180) and special laws.
Proven by preponderance of evidence.

Landmark Supreme Court Doctrines

Barredo v. Garcia, G.R. No. 48006, October 8, 1942: The main opinion declared that civil liability ex quasi-delicto is separate and independent from civil liability ex delicto. The same negligent act may give rise to obligations under both sources simultaneously; the injured party may elect to pursue either or both civil remedies, subject to the prohibition against double recovery.
Cangco v. Manila Railroad Co., G.R. No. 12191, October 14, 1918: The Court established the foundational distinction between culpa contractual (negligence that breaches a pre-existing contract) and culpa aquiliana (quasi-delict arising where no contractual relation exists). The presence or absence of a pre-existing contract determines which source governs the resulting obligation to pay damages.

These two doctrines are repeatedly tested when facts involve negligence that may straddle criminal, contractual, or extra-contractual liability.

Key Exceptions, Qualifications, and Distinctions

Pre-existing contractual relation rule (Art. 2176): If a contract already exists between the parties, damage caused by negligence in the performance of that contract is generally governed by contract rules (culpa contractual), not quasi-delict. Only when the negligent act is independent of the contract or the contract itself is breached by a tortious act may concurrent liability arise.

Independence of delict and quasi-delict remedies: The same act may produce both criminal liability (delict) and civil liability ex quasi-delicto. The injured party may choose the more advantageous civil action; acquittal in the criminal case on reasonable doubt does not automatically bar the civil action based on quasi-delict.

No presumption of obligations from law: Article 1158 is a strict limitation—courts will not enforce an obligation merely because it is “fair” or “equitable” unless the law expressly creates it.

Quasi-contracts are not contracts: There is no meeting of minds, no autonomy of will, and no mutuality. They are purely creatures of equity.

Comparison Table of the Five Sources

Source	Basis	Consent Required?	Standard of Proof	Key Governing Provisions	Typical Example	Employer Liability
Law	Express legal provision	No	By the law itself	Art. 1158 + specific law	Payment of income tax	N/A
Contract	Meeting of minds	Yes	Evidence of agreement	Arts. 1159, 1305 et seq.	Breach of a lease agreement	Per contract terms
Quasi-contract	Equity / unjust enrichment	No	Benefit conferred + lack of legal basis	Arts. 2144–2175	Payment of another's debt by mistake (solutio indebiti)	N/A
Delict	Crime / penal violation	No	Beyond reasonable doubt (criminal)	RPC Art. 100 + Art. 1161	Physical injuries from assault	Subsidiary (RPC Art. 103)
Quasi-delict	Fault or negligence	No	Preponderance of evidence	Arts. 2176–2194	Vehicular collision due to reckless driving (no criminal intent)	Direct & primary (Art. 2180)

How This Topic Appears in Bar Essay Questions

Examiners commonly present a factual narrative and ask the candidate to:

Identify the source(s) of obligation and explain why;
Distinguish why one source applies and another does not;
Discuss the rights, obligations, and remedies of the parties; or
Apply the Barredo or Cangco doctrines to overlapping negligence facts.

Typical fact patterns:

A motorist hits a pedestrian while texting (possible quasi-delict; possible delict if reckless imprudence is charged).
A person pays a debt twice by mistake or pays the debt of another without authority (quasi-contract — solutio indebiti or negotiorum gestio).
Parties sign a contract but one performs negligently (contract, not quasi-delict).
A statute imposes a duty to maintain a building (obligation from law).

Common pitfalls:

Automatically labeling every negligent act as a delict without checking whether a crime was actually committed.
Ignoring the “no pre-existing contractual relation” requirement and misclassifying a contractual breach as a quasi-delict.
Failing to cite the specific article (Art. 1157 for source; Art. 2176 for quasi-delict definition; Art. 1158 for law).
Omitting discussion of possible concurrent sources or election of remedies.

Best answer structure:

Quote or paraphrase Article 1156 and list the five sources under Article 1157.
Classify the facts into the correct source(s), citing the specific codal basis for that source.
State the governing rules and requisites.
Apply the rules directly to the facts (who is liable, to whom, for what amount or performance, and why).
Address distinctions or concurrent liabilities if the facts suggest them.
Conclude with available remedies or defenses.

Practical Application Tips or Memory Aids

Mnemonic for Article 1157 (order of sources): L-C-Q-D-Q
Law – Contract – Quasi-contract – Delict – Quasi-delict.
Phrase to remember: “Lawyers Create Quite Distinct Quasi-obligations.”

Drafting tip for essays: Always open the answer with:
“Under Article 1157 of the Civil Code, obligations arise from law, contracts, quasi-contracts, acts or omissions punished by law, and quasi-delicts.”
Then immediately classify the facts. This signals mastery and organizes the discussion for the examiner.

High-yield distinction to memorize:

Delict → criminal intent or at least a punishable act; employer liability is subsidiary.
Quasi-delict → mere fault or negligence; no criminal intent; employer liability is direct and primary (Art. 2180).
This distinction appears almost every time negligence facts are given.

Key Takeaways

There are exactly five exclusive sources of obligations (Art. 1157); no others exist.
Law obligations are never presumed — they must be expressly provided (Art. 1158).
Contracts derive their binding force from the will of the parties and must be performed in good faith (Art. 1159).
Quasi-contracts rest on equity to prevent unjust enrichment; consent is irrelevant.
Delicts require a crime; civil liability follows criminal liability (RPC Art. 100).
Quasi-delicts require fault or negligence plus the absence of any pre-existing contractual relation (Art. 2176); proven by preponderance of evidence.
The Barredo doctrine permits the same negligent act to give rise to both delict and quasi-delict liabilities, with the injured party free to elect the civil remedy.
The Cangco distinction between culpa contractual and culpa aquiliana turns on the existence or absence of a pre-existing contract.
In every essay answer, cite the codal provision for the source, state its requisites, and apply them to the facts — this is the formula for high scores on this topic.