Concept and Function
Capacity to act is the power of a person to perform juridical acts that produce legal effects by that person's own will. It is the civil law measure of whether a person can bind himself, dispose of rights, give consent, waive protections, assume obligations, or validly exercise legal choices without another person acting for him.
It is distinct from juridical capacity. Juridical capacity is the fitness to be the subject of legal relations; every natural person has it and loses it only through death. Capacity to act is acquired, may be restricted, may be modified by status or special law, and may require representation when the law considers the person unable to protect his own interests in a particular act.
The distinction matters because a person may have rights even if he cannot personally exercise them. A minor may own property, inherit, be donated property, recover damages, or be bound by obligations arising from property relations; but he ordinarily acts through a parent, guardian, or other legal representative when the act requires full civil consent.
Capacity to act is therefore not the source of personality. It is a legal instrument for regulating the exercise of rights. The law preserves the rights of persons with limited capacity while controlling the manner, timing, or validity of acts that may prejudice them or third persons.
Juridical Capacity and Capacity to Act
| Point of comparison | Juridical capacity | Capacity to act |
|---|---|---|
| Basic idea | Fitness to be a subject of rights and obligations | Power to perform acts with legal effect |
| Source | Inherent in every natural person upon civil personality | Acquired and regulated by law |
| Loss or limitation | Lost only through death for natural persons | May be restricted, modified, suspended, or supplied through representation |
| Practical effect | Allows a person to be the holder of civil rights | Allows a person to personally create, alter, transfer, or extinguish legal relations |
| Protective rule | Rights remain in the person | Exercise of rights may require assistance, authority, ratification, or court approval |
For juridical persons, capacity is not biological but legal. A corporation, partnership, association, or other juridical entity acts only through authorized organs or representatives, and its capacity is limited by law, its charter, its purposes, and public policy restrictions such as nationality rules. The natural-person rules on minority, mental condition, or civil interdiction do not apply in the same way, but the basic inquiry remains whether the law recognizes both the holder of the right and the authority to act for it.
Presumption and Proof of Capacity
Civil law begins from the working premise that a living person with civil personality can be the subject of legal relations and, upon reaching the age and conditions fixed by law, can perform civil acts. Incapacity is not presumed merely because an act is unwise, improvident, unfavorable, or later regretted.
The party who asserts incapacity generally bears the burden of showing the fact that restricts or modifies capacity. Minority is shown by age. Mental incapacity must be connected to the time of the act. Civil interdiction depends on the penal consequence imposed by law. Prodigality, guardianship, absence, insolvency, or trusteeship must rest on the legal situation that produces the limitation.
The presumption of existence is connected to capacity because rights and obligations attach only to persons. A person is treated as existing for civil law purposes until death is legally established or presumed under the applicable rules. When capacity to acquire, transmit, or exercise a right depends on survival, the party alleging death, prior death, or a different order of death must prove it.
Where the law treats two or more persons as having died under circumstances that make priority uncertain, no transmission of rights between them should be assumed in the absence of proof of survivorship. This rule prevents capacity to succeed, inherit, or transmit rights from resting on speculation.
The presumption of capacity is not absolute. It yields to express statutory incapacity, judicial declaration, established mental condition at the time of the act, special rules on family and property relations, and mandatory prohibitions based on status, citizenship, penalty, or public policy.
Acquisition of Full Civil Capacity
R.A. No. 6809 lowered the age of majority in the Philippines from twenty-one to eighteen years. As a general rule, a person who reaches eighteen years of age is no longer under parental authority by reason of minority and is qualified and responsible for acts of civil life, subject to exceptions established by law.
Majority gives the person the general ability to enter into contracts, administer property, sue or be sued without a guardian solely on account of age, give valid consent in ordinary civil transactions, and be responsible for the legal consequences of personal acts. It does not remove special legal qualifications that apply to particular transactions, offices, professions, licenses, family relations, or regulated property.
Before majority, the minor has juridical capacity but not full capacity to act. The minor's rights are exercised through parents, guardians, or legal representatives when representation is required. The minor may still acquire property, receive benefits, be protected against injury, and incur obligations that the law attaches to acts, property, unjust enrichment, or necessities.
Emancipation by mere private agreement does not create full capacity. Capacity is conferred by law. A parent, guardian, or third person cannot enlarge a minor's civil capacity beyond what the law allows, although valid representation may make an act effective for the minor within the limits of authority and required approvals.
The age of majority is the general doorway to capacity, but Philippine law remains transaction-specific. A person may be of age and still be disqualified from a particular act because of mental condition, penalty, alienage, fiduciary position, conflict of interest, family relation, insolvency, or a special statutory requirement.
Restrictions and Modifications
The Civil Code treats certain circumstances as restrictions, modifications, or limitations on capacity to act. These do not erase personality and do not necessarily make every act void. The legal consequence depends on the nature of the incapacity, the act performed, the protection intended by law, and whether the defect is curable by representation, approval, or ratification.
| Circumstance | Effect on capacity | Usual consequence |
|---|---|---|
| Minority | Restricts personal consent and independent disposition | Acts commonly require parental or guardian representation; many contracts are voidable rather than void |
| Insanity, dementia, or imbecility | Restricts capacity when the condition prevents intelligent consent at the time of the act | Acts may be annulled or may require guardianship; acts during a lucid interval may be valid if consent is real |
| State of being a deaf-mute | Matters only when the condition prevents the legally required understanding or expression of consent | Not a blanket incapacity; the effect depends on the person's ability to communicate legal intent and on the specific rule involved |
| Prodigality | Limits administration or disposition when habitual waste endangers legally protected interests | May justify guardianship or restrictions on property acts rather than total civil incapacity |
| Civil interdiction or penalty | Restricts rights as a consequence of conviction and sentence | May deprive the person, during the period fixed by law, of authority over property, parental authority, guardianship, or similar civil powers |
| Family relations | Modify capacity because status creates duties, consent requirements, and prohibitions | Acts between spouses, parents and children, or persons under authority may be restricted even when all parties are of age |
| Alienage | Limits capacity where the Constitution or statutes reserve rights to Filipino citizens or qualified entities | Particular acquisitions or activities may be void, prohibited, or unavailable regardless of age or sanity |
| Absence | Modifies the manner by which rights are administered when the person's whereabouts or existence is legally uncertain | Representation, administration, or succession consequences may arise under the rules on absence and presumptive death |
| Insolvency or trusteeship | Limits personal control over assets placed under legal administration or trust | Disposition and administration may pass to a trustee, assignee, receiver, guardian, or other authorized representative |
Restrictions based on age or mental condition are protective. Restrictions based on penalty, alienage, insolvency, trusteeship, or family relation often protect public policy, creditors, wards, spouses, children, or the integrity of regulated transactions.
Effects on Civil Acts
The effect of limited capacity is determined by the governing field of law. A defect in capacity may make an act voidable, void, unenforceable, subject to rescission, subject to court approval, or valid only through a representative. The label depends on whether the law protects a private party, prohibits the act altogether, or regulates the manner of exercising a right.
In contracts, incapacity often affects consent. A contract where consent is given by a minor or by a person unable to give intelligent consent is generally voidable when the law recognizes consent as present but defective. Annulment protects the incapacitated person, while ratification after capacity is acquired or through a proper representative may cleanse the defect when ratification is legally allowed.
A transaction is not merely voidable when the law absolutely prohibits it. If a statute or constitutional rule declares that a person cannot acquire a certain property, occupy a certain position, or enter a certain relation, the act may be void because the defect is not simply personal incapacity but legal disqualification.
In property law, incapacity to act does not prevent ownership. The owner with limited capacity remains the holder of the right, but acts of administration, encumbrance, compromise, partition, sale, mortgage, or donation may require representation and, in protective situations, judicial approval.
In succession, a person with juridical capacity may inherit even if he lacks full capacity to act. Acceptance, repudiation, partition, compromise, or settlement involving that person's hereditary rights may require a legal representative and court supervision when the heir is a minor or otherwise incapacitated.
In obligations arising from law, quasi-contract, quasi-delict, property relations, or unjust enrichment, restricted capacity does not automatically exempt the person from liability. The law may impose responsibility because the obligation does not depend solely on a fully capacitated contractual will.
In procedure, an incapacitated person remains the real party in interest when the substantive right belongs to him. The defect is addressed by appearance through a parent, guardian, guardian ad litem, trustee, or other representative so that the judgment binds the proper holder of the right without sacrificing procedural protection.
Representation, Ratification, and Protection
Representation supplies the lawful channel through which a person with limited capacity acts. Parents, guardians, trustees, administrators, receivers, or officers of juridical entities do not become the owners of the rights they exercise; they act for the person or estate within the authority given by law, judgment, appointment, or governing instrument.
Ratification operates only when the defect is one that the law allows to be cured. A person who was a minor may, after reaching majority, confirm a voidable contract. A guardian or representative may ratify within lawful authority when ratification serves the represented person's interest. No ratification can validate an act that is void because it is expressly prohibited or contrary to mandatory law.
Restitution rules also reflect the protective purpose of incapacity. When a voidable contract is annulled, the incapacitated person is generally required to return only what remains or what benefited him, while the capacitated party may be required to restore what he received. The law prevents capacity rules from becoming a means to exploit the protected person.
Guardianship and similar protective proceedings do not create civil personality and do not transfer beneficial ownership. They regulate the exercise of rights, preserve property, authorize necessary transactions, and protect the incapacitated person and third persons who deal with the estate or representative.
Integrated Civil Law View
Capacity to act should be read with civil personality, status, family relations, contracts, property, succession, obligations, and remedial rules. A single person may be fully capacitated for one act, disqualified for another, and required to act through a representative for a third.
The central inquiry is whether the law allows the person to perform the specific juridical act personally at the relevant time. If not, the next inquiry is whether the act is prohibited, merely voidable, capable of ratification, effective through representation, or subject to court approval.
The doctrine preserves two policies at the same time: respect for personality and protection against legally defective acts. Every natural person remains a bearer of rights, but not every person may personally exercise every right in every transaction.