Ratification occupies a central place in Philippine contract law as the voluntary and intentional act by which a party with the power to avoid a defective contract chooses instead to confirm and adopt it, thereby extinguishing any ground for annulment or enforcement objection. Rooted in the Civil Code of the Philippines (Republic Act No. 386), ratification reflects the civil-law principle that defects arising from lack of capacity, vitiated consent, or absence of authority are curable by the free and informed will of the person entitled to invoke them. It applies exclusively to voidable and unenforceable contracts; void or inexistent contracts, being absolute nullities under Article 1409, can never be ratified.

Nature and Legal Basis

Ratification is not a new contract but a retroactive confirmation of an existing one. It operates on the premise that the defect is relative—curable by the very person protected by the law—rather than absolute. The Civil Code treats ratification as a mode of extinguishing the action to annul (for voidable contracts) or of rendering enforceable (for unenforceable contracts) an obligation that would otherwise remain vulnerable. Its juridical effect is to cleanse the contract of all defects from the moment of its original constitution, as if no defect had ever existed.

Classification of Contracts Subject to Ratification

Voidable (Annullable) Contracts (Articles 1390–1402)
These are valid until annulled. Grounds include:
- Incapacity of one party (minors, insane persons, deaf-mutes unable to read/write, spendthrifts under guardianship).
- Vitiated consent (mistake, violence, intimidation, undue influence, fraud).
  Once ratified, the contract becomes absolutely valid and can no longer be attacked on those grounds.
Unenforceable Contracts (Article 1403)
These produce no legal effect until ratified. The three classes are:
- Contracts entered into in the name of another by one without authority or legal representation, or who exceeded his powers.
- Contracts that fail to comply with the Statute of Frauds (oral agreements concerning real property, goods over ₱500, etc.).
- Contracts where both parties are legally incapacitated.
  Ratification here transforms an unenforceable agreement into a fully binding and enforceable contract.

Requisites for a Valid Ratification

Philippine jurisprudence and the Civil Code demand strict compliance with four essential elements:

Knowledge of the Defect
The ratifying party must have full awareness of the facts that render the contract voidable or unenforceable. Ratification made in ignorance of the defect is void.
Intention to Ratify
There must be a deliberate and unequivocal will to adopt the contract. Mere silence or inaction does not suffice unless accompanied by circumstances that clearly imply consent.
Capacity to Ratify
The ratifying party must possess legal capacity at the time of ratification. A minor who ratifies upon reaching majority does so validly; a guardian may ratify on behalf of a ward only if authorized by the court or by law.
The Entire Contract Must Be Ratified
Partial ratification is not allowed. The act must embrace the whole contract; selective ratification is ineffective.

Forms of Ratification

Ratification may be express or tacit (Article 1393).

Express Ratification
Occurs through a written or oral declaration clearly manifesting the intent to confirm the contract. Examples include a formal deed of ratification, a letter acknowledging the contract’s validity, or a judicial pleading admitting its binding force. No new consideration is required.
Tacit (Implied) Ratification
Arises from conduct that necessarily implies waiver of the right to annul or enforce. Article 1393 expressly states: “It is understood that there is tacit ratification if, with knowledge of the reason which renders the contract voidable and such reason having ceased, the person who has a right to invoke it should execute an act which necessarily implies an intention to waive his right.”
Illustrations include:
- Continuing to make payments or accept benefits after discovering the defect.
- Using or disposing of the subject matter as owner.
- Failing to repudiate the contract within a reasonable time after attaining capacity or discovering fraud.
- Executing a new agreement that presupposes the validity of the original contract.

Who May Ratify

Only the person (or his representative) entitled to invoke the defect may ratify:

In voidable contracts: the injured party, his guardian (while incapacity exists), or his heirs/assigns after his death.
In unenforceable contracts entered without authority: the principal or his legal representative.
For incapacitated persons: ratification becomes possible upon removal of incapacity (e.g., majority, recovery of sanity) or by the guardian with proper authority.
Heirs inherit the right to ratify or annul, but only if the decedent had not already lost that right through prescription or prior ratification.

Third persons who acquired rights in good faith before ratification are protected; ratification cannot prejudice them.

Effects of Ratification

The Civil Code spells out the far-reaching consequences:

Retroactive Effect (Article 1396): “Ratification cleanses the contract from all its defects from the moment it was constituted.” The contract is deemed valid from inception.
Extinguishment of Actions: The action to annul a voidable contract (four-year prescriptive period under Article 1391) is extinguished. For unenforceable contracts, the defense of unenforceability disappears.
Loss of Right to Annul: No subsequent action based on the original defect can prosper.
Obligation to Perform: All parties become bound as if the contract had always been perfect.
No Prejudice to Third Persons: Rights acquired by innocent third parties in good faith prior to ratification remain intact.

Special Rules in Agency Law

Ratification in the law of agency (Articles 1868–1932) follows the same principles but carries additional nuances. An agent who acts without authority or exceeds his powers binds no one unless the principal ratifies. Requisites are identical: full knowledge, intent, and capacity. The principal’s ratification relates back to the date of the agent’s act, binding the principal as if authority had existed from the beginning. However, ratification must occur before the third party withdraws, and it cannot prejudice intervening rights of innocent parties. Express ratification may be by word or deed; tacit ratification occurs when the principal, with knowledge, accepts the benefits or remains silent when duty requires objection.

Prescription, Laches, and Limits on Ratification

Although ratification itself has no prescriptive period, the right to annul a voidable contract prescribes in four years (Article 1391), counted from:

Discovery of fraud or mistake.
Attainment of majority or cessation of incapacity.
Termination of violence or intimidation.

Laches may bar ratification or annulment where unreasonable delay prejudices the other party. Once the prescriptive period lapses without action, the contract is deemed ratified by operation of law through inaction. Ratification is impossible after a final judgment of annulment has become executory.

Distinctions from Related Concepts

Ratification vs. Confirmation: Confirmation applies to contracts that are merely irregular or defective in form; ratification applies to those that are voidable or unenforceable.
Ratification vs. Novation: Novation creates a new obligation; ratification validates the old one retroactively.
Ratification vs. Acknowledgment: Acknowledgment merely recognizes an existing debt; ratification cures a specific contractual defect.
Ratification vs. Estoppel: Estoppel arises by operation of law to prevent injustice; ratification requires voluntary act.

Practical Implications in Philippine Jurisprudence

Courts consistently emphasize that ratification must be clear, unequivocal, and made with full knowledge. Any ambiguity is resolved against ratification. In real-property transactions, ratification must often comply with formal requirements (e.g., notarization, registration) to bind third persons. In corporate law, ratification by the board of directors or stockholders follows the same Civil Code rules when officers act ultra vires.

In sum, ratification embodies the Philippine legal system’s preference for stability and the sanctity of consensual obligations once the protected party freely chooses to uphold them. It transforms potential nullity into perfect validity, retroactively and conclusively, provided the strict requisites of knowledge, intent, capacity, and completeness are met. Through express declaration or unequivocal conduct, parties exercise their sovereign will to heal what the law initially allowed them to reject, thereby upholding the fundamental policy that contracts, once ratified, must be respected as the law between the parties.