Short answer. Yes. Article 871 expressly allows a testator to institute an heir for a certain purpose or cause. Attaching a purpose to a bequest — whether building a school, supporting a charity, or any other cause — is a recognized and lawful way to structure a testamentary disposition.
What the law says
The institution of an heir may be made conditionally, or for a certain purpose or cause.
Civil Code, Article 871 — Conditions and Terms Are Allowed. Read the full provision →
Purpose and condition are both permitted
Article 871 recognizes two ways a testator can qualify the institution of an heir: by attaching a condition, or by tying it to a purpose or cause. These are not the same thing. A condition is a future uncertain event that either must happen or must not happen for the institution to take effect. A purpose or cause, by contrast, designates how the inherited property is to be used — the heir receives the inheritance but is expected or required to apply it toward the stated aim.
What a purpose-based institution looks like in practice
A testator might write: 'I leave my building to my nephew, for the purpose of establishing a school for the children of our barangay.' Or: 'I leave my savings to the parish, to be used solely for the support of the elderly in our community.' In both cases, the heir or legatee receives the property — but receives it burdened with an obligation to apply it toward the stated purpose. The will creates a moral and legal obligation tied to the inheritance itself.
Purpose is not the same as a condition suspending the institution
The distinction matters practically. When an institution is made subject to a condition, the heir may not take the inheritance until the condition is satisfied or determined. When an institution is made for a cause or purpose, the heir typically receives the inheritance immediately but is bound to apply it as directed. Failure to carry out the purpose may give rise to a legal remedy — but it does not prevent the transfer in the first place. Whether the will creates a condition or a purpose depends on how it is worded, and courts will look at the testator's actual intent.
Limits: legitimes still cannot be burdened
The testator's freedom to attach a purpose applies to the free portion of the estate — the share the testator can dispose of as he wishes. The law protects the legitimes of compulsory heirs from any conditions, substitutions, or burdens. A purpose imposed on the legitime portion is void with respect to the legitime, though it may be valid as to any excess beyond the protected share. If you are drafting a will or evaluating one that includes a purpose institution, a lawyer can help you ensure the structure complies with the rules on compulsory succession and will not expose the estate to a challenge.