SUBJECT: The Concept of ‘Preterition’ and the Annulment of Heirship

I. Introduction

This memorandum provides an exhaustive analysis of the concept of preterition under Philippine civil law, specifically its legal definition, requisites, and the consequential effect of the annulment of heirship in testamentary succession. Preterition, derived from the Spanish “preterición,” refers to the omission in the testator’s will of one, some, or all of the compulsory heirs in the direct line, without instituting them as heirs or without expressly disinheriting them. The primary legal consequence of preterition, as established in Article 854 of the Civil Code, is the annulment of the institution of heirs, thereby opening the door to total or partial intestate succession. This memo will dissect the doctrinal foundations, jurisprudential applications, and nuanced exceptions to this pivotal rule of testamentary succession.

II. Legal Foundation and Definition

The governing provision is Article 854 of the Civil Code, which states: “The preterition or omission of one, some, or all of the compulsory heirs in the direct line, whether living at the time of the execution of the will or born after the death of the testator, shall annul the institution of heir; but the devises and legacies shall be valid insofar as they are not inofficious. The compulsory heirs who were not instituted may demand the reduction of inofficious devises and legacies.” Preterition is thus a statutory cause for the annulment of the testamentary institution of heirs. It is crucial to distinguish preterition from mere disinheritance. Disinheritance is an express act of exclusion for a cause specified by law (Articles 915-920, Civil Code), while preterition is a silent, inadvertent, or intentional omission without such cause.

III. Requisites of Preterition

For Article 854 to apply, the following requisites must concur:

The omitted heir must be a compulsory heir in the direct line. This includes legitimate children and descendants, with respect to their legitimate parents and ascendants; and legitimate parents and ascendants, with respect to their legitimate children and descendants. Illegitimate children are not compulsory heirs in the direct line for purposes of preterition; they are entitled only to a legitime under Article 895, and their omission constitutes disinheritance only if so expressed.

The omission must be total. The compulsory heir is not mentioned at all in the will, either as an instituted heir or as an expressly disinherited heir. Merely receiving a lesser share than the legitime constitutes impairment of the legitime, not preterition.

The omitted compulsory heir must be living at the time of the testator’s death or conceived before the testator’s death and born thereafter. The law also protects compulsory heirs living at the time of the execution of the will.

The will must contain an institution of an heir. If the will only contains devises and legacies without instituting an heir, the rule on preterition does not apply; the succession becomes entirely intestate.

IV. Consequence: Annulment of the Institution of Heir

The central and mandatory effect of preterition is the annulment of the institution of heir. This annulment is total, not partial. The entire institution of heirs, whether one or many, is voided. This does not mean the entire will is annulled. Devises and legacies may remain valid to the extent they do not impair the legitime of the omitted compulsory heirs. The annulled institution opens the succession to intestacy. The estate shall be distributed according to the rules of legal or intestate succession (Articles 978-1015, Civil Code), with the omitted compulsory heirs receiving their full intestate shares, which include their legitime and any available free portion.

V. Distinction from Disinheritance and Impairment of Legitime

It is imperative to differentiate these three concepts:
Preterition: Total omission of a compulsory heir in the direct line*; results in annulment of institution of heir.
Disinheritance: Express exclusion of a compulsory heir (in any line) for a specific, valid cause enumerated in the Civil Code (Articles 915, 916, 919, 920); the disinherited heir loses the right to the legitime*, and the institution of other heirs stands.
Impairment of Legitime: The compulsory heir is instituted or mentioned but receives less than the legitime; the remedy is not annulment but reduction of inofficious devises and legacies (Article 906, Civil Code*).

VI. Exceptions and Special Rules

The general rule on preterition admits of specific exceptions:

Preterition of compulsory heirs not in the direct line (e.g., the surviving spouse) does not annul the institution of heir. Their remedy is to demand their legitime through reduction.

If the omitted compulsory heir in the direct line dies before the testator, no preterition occurs, as the heir predeceased the testator.

If the institution of heirs is annulled due to preterition, and the omitted heirs are the same persons who would succeed in intestacy, the will is considered cumulated with intestate succession, and the devises and legacies may be given effect.

The rule applies to wills, not to donations mortis causa, which are governed by the rules on legitime.

VII. Comparative Analysis: Preterition vs. Disinheritance

The following table contrasts the key elements of preterition and disinheritance.

Aspect	Preterition	Disinheritance
Governing Provision	Article 854 of the Civil Code	Articles 915-920 of the Civil Code
Nature of Act	Omission or silence; heir is not mentioned.	Positive act of exclusion; heir is expressly named and disinherited.
Heirs Covered	Only compulsory heirs in the direct line (legitimate children/descendants, legitimate parents/ascendants).	Any compulsory heir, including the surviving spouse and illegitimate children.
Legal Cause Required	No cause needed or stated.	A specific cause enumerated by law must be stated in the will.
Primary Effect	Annulment of the institution of heir in the will.	The disinherited heir loses right to legitime; institution of other heirs remains valid.
Effect on the Will	Institution of heirs void; devises/legacies may stand if not inofficious.	The will remains fully valid except for the disinheritance clause.
Mode of Succession	Leads to total or partial intestate succession.	Testamentary succession proceeds among the instituted heirs.
Remedy of Omitted/Excluded Heir	To seek annulment of institution and claim intestate share.	To file an action for nullity of disinheritance if cause is false or not legally specified.

VIII. Jurisprudential Application

The Supreme Court has consistently upheld the strict application of Article 854. In Añonuevo v. Intestate Estate of Añonuevo, the Court held that the omission of a compulsory heir in the direct line, even if the testator believed the heir was already provided for, constitutes preterition annulling the institution. In the landmark case of Reyes v. Barretto-Datu, the Court clarified that the annulment is of the institution of heirs, not the entire will, and that the validity of devises and legacies is subsidiary to the full satisfaction of the legitime of the omitted heirs. Furthermore, in Testate Estate of Manuela de Leon v. Court of Appeals, the Court ruled that the presence of a pretermitted heir (a child born after the making of the will) also triggers the application of Article 854.

IX. Procedural Implications

An action to declare the annulment of institution of heirs due to preterition is typically brought as part of a testate proceeding or as a separate declaratory action. The omitted heir has the burden of proving his status as a compulsory heir in the direct line and his total omission from the will. The prescriptive period for filing such an action is governed by the rules on action upon a written contract (10 years under Article 1144), as a will is considered a unilateral contract. The action is imprescriptible if based on the intrinsic nullity of the institution, but practitioners should file within the 10-year period to avoid laches.

X. Conclusion

Preterition is a unique and potent legal mechanism in Philippine succession law designed to protect the indefeasible share of compulsory heirs in the direct line. Its operation is strict and automatic upon the concurrence of its requisites, leading to the annulment of the testamentary institution of heirs. This compels a distribution via intestate succession, ensuring the omitted heirs receive their lawful shares. Legal practitioners must exercise utmost care in the drafting of wills to avoid inadvertent preterition, which can completely frustrate the testator’s primary distributive plan while still allowing devises and legacies to survive if they do not infringe upon the legitime. A clear understanding of the distinction between preterition, disinheritance, and impairment of the legitime is fundamental to effective estate planning and litigation.