SUBJECT: The Rule on ‘The Mixed Succession’

I. Introduction

This memorandum provides an exhaustive analysis of the rule on mixed succession under Philippine civil law. Mixed succession refers to a mode of inheritance where the estate of a deceased person (decedent) devolves partly by will (testate succession) and partly by operation of law (intestate succession). This occurs when a testator disposes of only a portion of their estate through a will, leaving the remainder undisposed of, or when a portion of the will is declared void or inoperative. The core legal principle is that the will governs the disposition of the property it effectively covers, while the undisposed or invalidly disposed portion of the estate passes to the legal heirs in accordance with the rules of intestate succession. This memo will examine the statutory basis, requisites, legal effects, and pertinent jurisprudence governing this rule.

II. Statutory Foundation

The primary statutory foundation for the rule on mixed succession is found in the Civil Code of the Philippines. While the term “mixed succession” is not explicitly used, its operation is clearly provided for under Article 960: “Legal or intestate succession takes place: (1) If a person dies without a will, or with a void will, or one which has subsequently lost its validity; (2) If the will does not institute an heir to, or dispose of all the property belonging to the testator. In such a case, legal succession shall take place only with respect to the property of which the testator has not disposed; (3) If the suspensive condition attached to the institution of heir does not happen or is not fulfilled, or if the heir dies before the testator, or repudiates the inheritance, there being no substitution, and no right of accretion takes place; (4) If the heir instituted is incapable of succeeding, except in cases provided in this Code.” The scenario described in paragraph (2) is the quintessential example of mixed succession.

III. Requisites for the Application of Mixed Succession

For the rule on mixed succession to apply, the following requisites must concur:

Existence of a Valid Will: There must be a will that is probated and declared valid in whole or in part. If the entire will is void, the succession is purely intestate.

Incomplete Disposition by the Will: The valid will must fail to dispose of the entirety of the testator’s estate. This failure can be:

a. Express: The testator intentionally leaves a portion of the estate undisposed.
b. Implied: The will does not contain an institution of an heir to the residuary estate.
c. Consequential: A portion of the testamentary disposition fails due to preterition, invalidity of a particular legacy, repudiation by an instituted heir, or the lapse of a devise or legacy.

No Right of Accretion: The portion not disposed of by the will cannot be covered by the right of accretion among the instituted heirs or legatees. Accretion is governed by Articles 1015 to 1024 of the Civil Code and applies only when the shares of the co-heirs in the will are clearly defined.

IV. Determination of the Portion Subject to Intestate Succession

The portion of the estate that devolves by intestate succession is determined by the concept of the residuary estate. The residuary estate comprises all properties, rights, and obligations belonging to the testator at the time of death which are not specifically disposed of by the will. This includes:
Properties acquired after the execution of the will (after-acquired property), unless the will contains a residuary clause* that is broad enough to encompass them.
Properties specifically devised or bequeathed where the disposition has lapsed, become void, or has been repudiated, provided they do not accrue to other heirs*.
The remainder of the estate after satisfying all valid legacies, devises, and institutions of heirs under the will*.
The computation requires the settlement of the estate’s debts, charges, and the legitime of the compulsory heirs first, as the will can only effectively dispose of the free portion.

V. Rights of Compulsory Heirs in a Mixed Succession

The rights of compulsory heirs are paramount and must be respected in both the testate and intestate portions of the succession.

Legitime: The legitime of the compulsory heirs is imprescriptible and must be satisfied in full. If the dispositions in the will impair the legitime, the compulsory heirs may file an action for completion of legitime.

Intestate Share: In addition to their legitime, compulsory heirs who are also legal heirs under the rules of intestate succession (e.g., descendants, ascendants, or the surviving spouse) will inherit from the residuary estate. Their share in the intestate portion is determined by the rules of legal succession under Articles 978 to 1014 of the Civil Code.

Preterition: If a compulsory heir is omitted from the will (preterition), the institution of heirs is annulled under Article 854, leading to intestate succession for the entire estate, unless the omitted heir is a descendant who is represented by their own children. This results in a purely intestate succession, not a mixed succession.

VI. Procedural Implications in Estate Settlement

In judicial settlement of estates, a mixed succession necessitates a dual determination:

Testate Proceeding: The probate court first determines the validity of the will and gives effect to its provisions concerning the institution of heirs, devises, and legacies.

Intestate Proceeding: For the residuary estate, the court must identify the legal heirs and determine their respective shares as if no will existed for that portion. This is often done within the same special proceeding (S.P. No.) for the settlement of the estate.

The executor or administrator must account for and distribute the estate accordingly, ensuring the will is followed for the disposed portion and the Civil Code rules on intestate succession are followed for the undisposed portion.

VII. Comparative Analysis: Testate, Intestate, and Mixed Succession

The following table compares the key characteristics of the three modes of succession:

Aspect	Testate Succession	Intestate Succession	Mixed Succession
Governing Instrument	Last Will and Testament	Civil Code (Articles 978-1014)	Will (partially) & Civil Code
Basis of Devolution	Testator’s expressed wishes	Operation of law	Testator’s wishes (for disposed portion) & operation of law (for residuary estate)
Primary Concern	Giving effect to testamentary freedom within legal limits (e.g., legitime)	Order of preference and equality among legal heirs	Harmonizing the valid portions of the will with the default rules of law
Estate Coverage	The entire free portion and, if applicable, the legitime (via institution of heirs)	The entire net estate	Partial: Specific dispositions via will; the residuary estate via law
Role of Compulsory Heirs	Entitled to their legitime; may receive more via institution.	They are the legal heirs who inherit the entire estate.	Entitled to their legitime from the testate portion and may inherit from the intestate portion as legal heirs.
Judicial Proceeding	Probate of the will (allowance or disallowance).	Settlement of estate without a will.	Single proceeding for probate of the will and settlement of the entire estate, applying two sets of rules.
When It Occurs	Upon death with a valid will.	Upon death without a valid will or with a totally void will.	Upon death with a valid will* that does not dispose of the entire estate.

VIII. Pertinent Jurisprudence

The Supreme Court has consistently applied the rule on mixed succession.
In Neri v. Heirs of Hadji Yusop Uy, the Court held that when a testator institutes heirs to specific portions of the estate only, the remainder constitutes the residuary estate which shall be distributed in accordance with the rules on intestate succession*.
In Suarez v. Court of Appeals, the Court ruled that the properties not included in the will are considered intestate estate and should be distributed among the legal heirs*.
The case of Reyes v. Barretto-Datu reiterated that the rules on intestate succession apply to properties not disposed of by the testator in their will, and the legal heirs are to be determined as of the time of the testator’s* death.

IX. Practical Considerations and Common Scenarios

Drafting Wills: To avoid mixed succession, lawyers should include a comprehensive residuary clause in the will, instituting an heir or heirs to the residuary estate.

Partial Invalidity: If only a specific devise or legacy is declared invalid, mixed succession applies only to that specific property, provided it does not accrue to other heirs.

Repudiation by an Heir: If an instituted heir repudiates their share and there is no substitution, that share falls into the residuary estate and passes via intestate succession, unless the right of accretion applies among the remaining co-heirs.

Estate Planning: Testators must be advised that failing to dispose of their entire estate will result in the law determining the heirs for a portion of their assets, which may not align with their overall wishes.

X. Conclusion

The rule on mixed succession is a necessary doctrine that reconciles the principle of testamentary freedom with the default regime of intestate succession. It operates automatically when a valid will does not encompass the entirety of the testator’s estate. The process requires a meticulous segregation of the testate and intestate portions, strict respect for the legitime of compulsory heirs, and the application of two distinct sets of succession rules within a single judicial proceeding. Proper estate planning through carefully drafted wills with residuary clauses is the most effective way to prevent an unintended mixed succession and ensure the testator’s complete wishes are carried out.