Introduction

Inheritance in the Philippines is governed primarily by the Civil Code of the Philippines, particularly its rules on succession, legitime, compulsory heirs, representation, disinheritance, and partition. Among the most important distinctions in Philippine succession law is the distinction between legitimate children and illegitimate children.

Although both legitimate and illegitimate children are recognized as heirs, Philippine law gives them different shares, different compulsory inheritance rights, and in some situations, different rights to inherit by representation. The law also imposes restrictions intended to protect the legitime of compulsory heirs.

This article explains the inheritance rights of legitimate and illegitimate children under Philippine law, including their legitime, intestate shares, rights in testate succession, effects of legitimation and adoption, proof of filiation, disinheritance, and practical issues in estate settlement.

I. Basic Concepts in Philippine Succession Law

1. Succession

Succession is the transfer of the rights, property, and obligations of a deceased person to his or her heirs. It takes place upon death.

Succession may be:

Testamentary succession — when the deceased left a valid will.
Legal or intestate succession — when the deceased left no will, or the will does not dispose of all property.
Mixed succession — when succession is partly by will and partly by law.

2. Estate

The estate consists of all property, rights, and obligations of the deceased that are not extinguished by death. Before heirs receive their inheritance, the estate must generally answer for debts, taxes, expenses of administration, and other lawful charges.

3. Heirs

An heir is a person called to succeed to the estate of the deceased, either by law or by will.

Philippine law recognizes two broad categories:

Compulsory heirs — heirs who cannot be deprived of their legitime except by valid disinheritance.
Voluntary heirs or devisees/legatees — persons named in a will to receive property.

Children, whether legitimate or illegitimate, may be compulsory heirs.

II. Legitimate and Illegitimate Children: Legal Definitions

1. Legitimate Children

A legitimate child is generally a child conceived or born during a valid marriage of the parents. The Family Code provides rules on legitimacy, including presumptions of legitimacy for children born within certain periods in relation to the marriage.

A legitimate child has full inheritance rights from both parents and from the legitimate relatives of each parent, subject to the rules of succession.

2. Illegitimate Children

An illegitimate child is a child conceived and born outside a valid marriage, unless the child is later legitimated or otherwise given the status of a legitimate child by law.

Illegitimate children have inheritance rights from their biological parents, but their rights are more limited than those of legitimate children.

The law recognizes the right of illegitimate children to inherit, but their legitime is generally one-half of the legitime of a legitimate child, subject to the important rule that the legitime of legitimate children must not be impaired.

III. Compulsory Heirs

Under the Civil Code, the following are compulsory heirs:

Legitimate children and descendants, with respect to their legitimate parents and ascendants.
Legitimate parents and ascendants, with respect to their legitimate children and descendants.
The surviving spouse.
Acknowledged natural children and natural children by legal fiction, and other illegitimate children referred to by law.
Legitimate brothers and sisters, nephews and nieces, but only in certain cases.

For modern purposes, the key compulsory heirs in relation to this topic are:

Legitimate children.
Illegitimate children.
Surviving spouse.
Legitimate parents or ascendants, if there are no legitimate children or descendants.

IV. The Concept of Legitime

1. Meaning of Legitime

The legitime is the portion of the deceased’s estate that the law reserves for compulsory heirs. A testator cannot freely dispose of the legitime by will.

For example, if a parent executes a will giving all property to a friend and leaving nothing to his or her children, the will may be valid in form, but the dispositions may be reduced to protect the legitime of the children.

2. Free Portion

The free portion is the part of the estate that the deceased may freely give to anyone by will, subject to the rule that compulsory heirs’ legitimes must first be respected.

3. Why Legitime Matters

The distinction between legitimate and illegitimate children is especially important because their legitimes are different.

In general:

Child	Legal Position
Legitimate child	Primary compulsory heir with full legitime
Illegitimate child	Compulsory heir, but receives a legitime equal to one-half of the legitime of a legitimate child
Legitimated child	Treated as legitimate
Legally adopted child	Generally treated as legitimate child of the adopter

V. Inheritance Rights of Legitimate Children

1. Legitimate Children Are Primary Compulsory Heirs

Legitimate children are among the strongest heirs under Philippine law. They are compulsory heirs and exclude certain other relatives from inheriting.

If a person dies leaving legitimate children, those children generally exclude the deceased’s legitimate parents, grandparents, siblings, nephews, nieces, and collateral relatives from inheriting by intestacy.

2. Legitime of Legitimate Children

The legitime of legitimate children and descendants consists of one-half of the hereditary estate of the parents.

This one-half is divided equally among all legitimate children.

Example:

A father dies leaving an estate of ₱10,000,000 and three legitimate children. Ignoring debts, taxes, and other complications, the legitime of the legitimate children is ₱5,000,000.

Each legitimate child has a legitime of:

₱5,000,000 ÷ 3 = ₱1,666,666.67

The remaining ₱5,000,000 is the free portion, although it may also be affected by the legitime of other compulsory heirs such as the surviving spouse and illegitimate children.

3. Equal Rights Among Legitimate Children

Legitimate children inherit equally from their parents. There is no distinction based on sex, age, birth order, or financial status.

The eldest child does not receive more by reason of being eldest. Sons do not inherit more than daughters. Married children and unmarried children have equal rights.

4. Right to Inherit from Both Parents

A legitimate child inherits from both the mother and the father. The child also belongs legally to the family of both parents and may inherit from legitimate ascendants and other relatives under the rules of succession.

5. Right of Representation

Legitimate descendants may inherit by right of representation.

Representation allows a descendant to step into the place of an heir who predeceased, was disinherited, or is incapacitated to inherit.

Example:

A grandfather dies. His son had already died before him. The son left two legitimate children. Those grandchildren may represent their deceased father and inherit the share the father would have received.

This right is important because legitimate children and descendants are connected to the legitimate family line.

VI. Inheritance Rights of Illegitimate Children

1. Illegitimate Children Are Also Compulsory Heirs

Illegitimate children are compulsory heirs of their parents. They cannot be deprived of their legitime except by valid disinheritance.

However, their share is smaller than that of legitimate children.

2. Legitime of Illegitimate Children

The legitime of each illegitimate child is generally one-half of the legitime of each legitimate child.

This rule is often stated as:

The legitime of an illegitimate child is one-half of the legitime of a legitimate child.

However, this rule is subject to an important limitation:

The legitime of illegitimate children must not impair the legitime of legitimate children.

This means that legitimate children’s reserved shares are protected first.

3. Example: Legitimate and Illegitimate Children Together

Suppose a father dies leaving an estate of ₱12,000,000. He is survived by:

Two legitimate children.
Two illegitimate children.
No surviving spouse.

The legitimate children are entitled to one-half of the estate as their legitime:

₱12,000,000 × 1/2 = ₱6,000,000

Each legitimate child’s legitime:

₱6,000,000 ÷ 2 = ₱3,000,000

Each illegitimate child’s legitime is one-half of a legitimate child’s legitime:

₱3,000,000 ÷ 2 = ₱1,500,000

Total legitime of illegitimate children:

₱1,500,000 × 2 = ₱3,000,000

Total legitime:

₱6,000,000 + ₱3,000,000 = ₱9,000,000

Free portion:

₱12,000,000 − ₱9,000,000 = ₱3,000,000

4. Illegitimate Children Inherit Only from Their Parents, Not Generally from Legitimate Relatives

An illegitimate child has inheritance rights from his or her biological parent, but the child does not have the same reciprocal legal relationship with the legitimate relatives of that parent.

A central rule is the barrier between the legitimate family and the illegitimate family. Under this principle, an illegitimate child generally does not inherit intestate from the legitimate relatives of his or her parent, and legitimate relatives generally do not inherit intestate from the illegitimate child.

Example:

An illegitimate child may inherit from his father. But the child generally does not inherit by intestacy from the father’s legitimate parents or legitimate siblings, unless there is a will or another legal basis.

5. Proof of Filiation Is Essential

An illegitimate child must establish filiation to inherit. Without proof that the deceased was the child’s parent, the child cannot claim inheritance as a child.

Proof may include:

Record of birth appearing in the civil register.
Admission in a public document.
Private handwritten instrument signed by the parent.
Other evidence allowed by law, subject to the rules and time limits on proving filiation.

The ability to prove filiation may be the central issue in inheritance disputes involving illegitimate children.

6. Surname and Support Are Separate from Inheritance

The right to use the father’s surname, the right to support, and the right to inherit are related but distinct.

A child may have been supported by the father, or may have used the father’s surname, but inheritance still depends on legally recognized filiation and applicable succession rules.

VII. Legitimate and Illegitimate Children in Intestate Succession

Intestate succession applies when the deceased left no valid will, or when the will does not fully dispose of the estate.

1. If the Deceased Leaves Only Legitimate Children

If the deceased leaves legitimate children and no surviving spouse, the legitimate children inherit the entire estate equally.

Example:

Estate: ₱9,000,000 Heirs: Three legitimate children Each receives: ₱3,000,000

2. If the Deceased Leaves Legitimate Children and a Surviving Spouse

The surviving spouse inherits a share equal to that of each legitimate child.

Example:

Estate: ₱12,000,000 Heirs: Three legitimate children and surviving spouse The estate is divided into four equal shares.

Each legitimate child receives ₱3,000,000. The surviving spouse receives ₱3,000,000.

3. If the Deceased Leaves Legitimate Children, Illegitimate Children, and a Surviving Spouse

In intestacy, legitimate children, illegitimate children, and the surviving spouse may all inherit. The general proportional rule is:

Each legitimate child receives a full share.
The surviving spouse receives a share equal to one legitimate child.
Each illegitimate child receives one-half of the share of a legitimate child.

Example:

Estate: ₱14,000,000 Heirs:

Two legitimate children
One surviving spouse
Two illegitimate children

Assign shares by units:

Legitimate child 1 = 1 unit
Legitimate child 2 = 1 unit
Surviving spouse = 1 unit
Illegitimate child 1 = 1/2 unit
Illegitimate child 2 = 1/2 unit

Total units = 4

Value per unit:

₱14,000,000 ÷ 4 = ₱3,500,000

Distribution:

Legitimate child 1: ₱3,500,000
Legitimate child 2: ₱3,500,000
Surviving spouse: ₱3,500,000
Illegitimate child 1: ₱1,750,000
Illegitimate child 2: ₱1,750,000

4. If the Deceased Leaves Only Illegitimate Children

If the deceased leaves only illegitimate children and no legitimate children, legitimate parents, or surviving spouse, the illegitimate children may inherit the entire estate, subject to the rules on intestate succession.

Example:

Estate: ₱6,000,000 Heirs: Three illegitimate children Each receives: ₱2,000,000

5. If the Deceased Leaves Illegitimate Children and a Surviving Spouse, But No Legitimate Children or Descendants

If there are illegitimate children and a surviving spouse, but no legitimate children or descendants, both the surviving spouse and the illegitimate children inherit.

The exact division depends on the applicable Civil Code provisions, but generally the surviving spouse and illegitimate children are both recognized intestate heirs.

6. If the Deceased Leaves Legitimate Parents and Illegitimate Children

When there are no legitimate children or descendants, legitimate parents or ascendants may inherit along with illegitimate children.

In this situation, the law protects the legitime of legitimate parents and also recognizes the legitime of illegitimate children.

7. If the Deceased Leaves Legitimate Children and Illegitimate Parents

Illegitimate parents are generally excluded when the deceased is survived by children. The rules prioritize descendants.

VIII. Testate Succession: When There Is a Will

1. A Will Cannot Impair Legitime

A person may make a will, but the will cannot deprive compulsory heirs of their legitime.

If a will gives too much to other persons, the dispositions may be reduced to preserve the legitime of compulsory heirs.

2. Legitimate Children in Testate Succession

Legitimate children are entitled to their legitime regardless of what the will says, unless they are validly disinherited.

If the will gives a legitimate child less than his or her legitime, the child may demand completion of the legitime.

3. Illegitimate Children in Testate Succession

Illegitimate children are also entitled to their legitime. If the will omits them, gives them less than their legitime, or gives away property in a manner that impairs their legitime, they may seek reduction of testamentary dispositions.

4. Preterition

Preterition refers to the total omission of a compulsory heir in the direct line from the inheritance, whether intentional or not.

If a compulsory heir is completely omitted in a will, the institution of heirs may be annulled, although devises and legacies may remain valid if they do not impair legitime.

Preterition is especially important when a parent makes a will and fails to mention a child.

5. Disinheritance

A child may be deprived of legitime only through valid disinheritance. Disinheritance must comply with legal requirements:

It must be made in a valid will.
It must be for a cause expressly stated by law.
The cause must be specified in the will.
The cause must be true.
If contested, the heirs of the testator must prove the cause.

A mere statement like “I do not want my child to inherit” is not enough.

IX. Shares in Common Family Situations

The following examples simplify the rules. Actual distribution may be affected by debts, taxes, donations during lifetime, property regime of the spouses, collation, advances, disinheritance, representation, and other legal issues.

Situation 1: Parent Dies, Survived by Two Legitimate Children Only

Estate: ₱10,000,000 Heirs: Two legitimate children

Each receives:

₱10,000,000 ÷ 2 = ₱5,000,000

Situation 2: Parent Dies, Survived by Two Legitimate Children and One Illegitimate Child

Estate: ₱10,000,000 Heirs:

Two legitimate children
One illegitimate child

Using intestate proportions:

Legitimate child 1 = 1 unit
Legitimate child 2 = 1 unit
Illegitimate child = 1/2 unit

Total units = 2.5

Value per unit:

₱10,000,000 ÷ 2.5 = ₱4,000,000

Distribution:

Legitimate child 1: ₱4,000,000
Legitimate child 2: ₱4,000,000
Illegitimate child: ₱2,000,000

Situation 3: Parent Dies, Survived by Two Legitimate Children, One Illegitimate Child, and Surviving Spouse

Estate: ₱10,000,000 Heirs:

Two legitimate children
One illegitimate child
Surviving spouse

Units:

Legitimate child 1 = 1
Legitimate child 2 = 1
Surviving spouse = 1
Illegitimate child = 1/2

Total units = 3.5

Value per unit:

₱10,000,000 ÷ 3.5 = ₱2,857,142.86

Distribution:

Legitimate child 1: ₱2,857,142.86
Legitimate child 2: ₱2,857,142.86
Surviving spouse: ₱2,857,142.86
Illegitimate child: ₱1,428,571.43

Situation 4: Parent Dies, Survived by Illegitimate Children Only

Estate: ₱9,000,000 Heirs: Three illegitimate children

Each receives:

₱9,000,000 ÷ 3 = ₱3,000,000

Situation 5: Parent Dies, Survived by Surviving Spouse and Illegitimate Children Only

Estate: ₱12,000,000 Heirs:

Surviving spouse
Two illegitimate children
No legitimate children

The surviving spouse and illegitimate children share under the rules of intestate succession. The surviving spouse is not automatically excluded by illegitimate children, and illegitimate children are not automatically excluded by the surviving spouse.

X. Legitimated Children

1. Meaning of Legitimation

Legitimation is a legal process by which a child who was originally illegitimate becomes legitimate because of the subsequent valid marriage of the parents, provided the legal requirements are met.

2. Effect of Legitimation

A legitimated child enjoys the same rights as a legitimate child.

This means the child’s inheritance rights are upgraded from those of an illegitimate child to those of a legitimate child.

3. Retroactive Effect

Legitimation generally benefits the child from birth, subject to legal requirements and the rights of third persons.

4. Importance in Succession

If a child was born before the parents married but later became legitimated, that child should be treated as a legitimate child for inheritance purposes, not as an illegitimate child.

XI. Adopted Children

1. Adopted Child as Legitimate Child of the Adopter

A legally adopted child is generally considered a legitimate child of the adopter for purposes of parental authority, support, and succession.

Thus, an adopted child may inherit from the adopter as a legitimate child.

2. Effect on Relationship with Biological Parents

The effect of adoption on inheritance from biological parents depends on the applicable adoption law and circumstances. In general, adoption creates a legal parent-child relationship between adopter and adoptee, while rules on succession must be read together with the adoption decree and governing law.

3. Illegitimate Child Adopted by Biological Parent

When a biological parent adopts his or her own illegitimate child, the adoption may affect the child’s legal status and inheritance rights with respect to that parent. The specific effect depends on the applicable adoption law and the facts.

XII. Proof of Filiation and Its Importance in Inheritance

1. Why Filiation Matters

A person claiming inheritance as a child must prove that he or she is legally recognized as the child of the deceased.

For legitimate children, filiation is usually shown through the marriage of the parents and birth records.

For illegitimate children, proof may be more contested.

2. Common Evidence of Filiation

Evidence may include:

Birth certificate.
Record in the civil registry.
A public document signed by the parent.
A private handwritten instrument signed by the parent.
Judicial admissions.
Open and continuous possession of the status of a child, where allowed.
Other evidence permitted by the Rules of Court and substantive law.

3. Time Limits

Actions to establish filiation may be subject to time limits. These limits are especially important for illegitimate children.

A person claiming inheritance should not delay in asserting filiation, especially if the parent has died or estate proceedings are pending.

4. Recognition in Birth Certificate

A father’s signature on the birth certificate may be important evidence. However, the legal effect depends on the contents, form, and compliance with civil registry requirements.

5. DNA Evidence

DNA evidence may be relevant in proving biological relationship, but inheritance rights still depend on legal filiation and procedural rules. Biological connection alone may not automatically settle all succession issues if legal requirements and time limits are not met.

XIII. The Barrier Between Legitimate and Illegitimate Families

A major principle in Philippine succession law is sometimes described as the iron curtain rule or barrier between the legitimate and illegitimate family.

Under this doctrine:

Illegitimate children may inherit from their parents.
Legitimate children may inherit from their parents.
But illegitimate children generally do not inherit by intestacy from the legitimate relatives of their parent.
Legitimate relatives generally do not inherit by intestacy from illegitimate children.

Example:

Juan has an illegitimate child, Pedro. Juan’s legitimate father, Don Carlos, dies. Pedro generally cannot inherit from Don Carlos by intestate succession merely because Pedro is Juan’s biological child.

However, Don Carlos may give property to Pedro by will, subject to the legitime of Don Carlos’s compulsory heirs.

XIV. Representation and Illegitimate Children

1. General Rule

Legitimate descendants may inherit by right of representation within the legitimate family line.

Illegitimate children have more limited rights of representation.

2. Illegitimate Child Representing a Parent

An illegitimate child generally cannot represent a legitimate parent in the inheritance of a legitimate grandparent because of the legal barrier between legitimate and illegitimate relatives.

Example:

A legitimate son dies before his legitimate father. The son left an illegitimate child. When the grandfather later dies intestate, the illegitimate grandchild generally cannot represent the deceased son in the succession of the legitimate grandfather.

3. Representation in the Illegitimate Line

Illegitimate children may have rights in relation to their own illegitimate descendants, subject to the applicable Civil Code provisions and the nature of the succession.

XV. Donations and Advances to Children

1. Donations During Lifetime

Parents often transfer property to children during their lifetime. These transfers may affect inheritance later.

A donation to a compulsory heir may be considered an advance on inheritance, depending on the circumstances.

2. Collation

Collation is the process of bringing into account certain donations or benefits received by heirs during the lifetime of the deceased, so that the estate can be distributed fairly.

Example:

A parent gives one legitimate child a house during the parent’s lifetime. Upon the parent’s death, the value of that donation may need to be considered in determining whether the child has already received part or all of his or her inheritance.

3. Donations Cannot Impair Legitime

A parent cannot defeat the legitime of legitimate or illegitimate children by giving away all property during life. If donations impair legitime, they may be reduced.

4. Sale Disguised as Donation

If property was allegedly sold to one child but no real consideration was paid, other heirs may challenge the transaction as a simulated sale or donation intended to prejudice their legitime.

XVI. Property Regime of the Parents and Its Effect on Inheritance

Before determining a child’s inheritance, one must first determine what property actually belongs to the deceased.

If the deceased was married, not all property in the marriage automatically belongs entirely to the deceased. The applicable property regime must be settled first.

Common property regimes include:

Absolute community of property.
Conjugal partnership of gains.
Complete separation of property.

Example:

If a married man dies and a house is conjugal property, only his share in the conjugal property forms part of his estate. The surviving spouse’s share is not inherited because it already belongs to the spouse.

This is important because children inherit only from the deceased parent’s estate, not from property that legally belongs to the surviving spouse.

XVII. Estate Settlement

1. Extrajudicial Settlement

If the deceased left no will and the heirs agree, the estate may sometimes be settled through an extrajudicial settlement, provided legal requirements are met.

All heirs, including legitimate and illegitimate children, must be considered. Excluding an illegitimate child who is legally entitled to inherit may lead to future litigation.

2. Judicial Settlement

Judicial settlement may be necessary when:

There is a will.
Heirs disagree.
Filiation is contested.
There are debts or complicated assets.
There are minors or incapacitated heirs.
There are disputes over donations, sales, or property ownership.

3. Estate Tax

Inheritance distribution is separate from estate tax compliance. The estate may need to file estate tax returns and settle taxes before transfer of titles.

4. Transfer of Titles

For real property, heirs may need to execute settlement documents, pay estate taxes, secure a Certificate Authorizing Registration, and transfer title through the Registry of Deeds.

XVIII. Disinheritance of Legitimate and Illegitimate Children

1. Children Cannot Be Disinherited Without Legal Cause

A parent cannot disinherit a child simply because of personal dislike, poverty, estrangement, or preference for another child.

Disinheritance must be based on causes allowed by law.

2. Causes for Disinheriting Children

Legal causes may include serious acts such as:

Maltreatment of the parent.
Attempt against the life of the parent.
Accusation of a crime punishable by imprisonment, if groundless and serious.
Refusal without justifiable cause to support the parent.
Conviction of adultery or concubinage with the spouse of the parent.
Other causes provided by law.

The precise statutory grounds must be carefully checked before relying on disinheritance.

3. Effect of Invalid Disinheritance

If disinheritance is invalid, the child remains entitled to his or her legitime.

4. Reconciliation

Reconciliation between parent and child may render disinheritance ineffective.

XIX. Common Disputes Involving Legitimate and Illegitimate Children

1. Omitted Illegitimate Child

A common dispute occurs when legitimate children settle an estate without including an illegitimate child.

If the illegitimate child can prove filiation and inheritance rights, the settlement may be challenged.

2. Denial of Filiation

Legitimate heirs may contest whether the alleged illegitimate child is truly a child of the deceased.

The outcome often depends on documents, admissions, birth records, and other evidence.

3. Disputed Donations

Children may dispute transfers made by the deceased during life, especially if one heir received property substantially greater than others.

4. Simulated Sales

A parent may appear to sell property to one child, but the sale may be challenged if it was actually a donation or if no real payment was made.

5. Second Families

Inheritance disputes often arise where the deceased had:

A first legal family.
A second partner.
Children outside marriage.
Properties acquired during different relationships.

The law distinguishes between the rights of spouses, legitimate children, illegitimate children, and partners who were not legally married.

6. Unsettled Marital Status

Questions may arise if the deceased had an annulment, legal separation, void marriage, bigamous marriage, or subsequent relationship. These facts can significantly affect whether children are legitimate or illegitimate and whether a surviving spouse has inheritance rights.

XX. Children Born of Void or Voidable Marriages

The status of children born in irregular marital situations depends on the Family Code and related laws.

1. Void Marriages

Children of void marriages are generally illegitimate, except in specific cases provided by law.

2. Voidable Marriages

Children conceived or born before the decree of annulment in a voidable marriage are generally legitimate.

3. Psychological Incapacity and Certain Void Marriages

Children conceived or born before the judgment of nullity under certain provisions may be considered legitimate, depending on the governing Family Code rule.

Because status directly affects inheritance, the exact nature of the marriage and the timing of the child’s conception and birth are crucial.

XXI. Rights of Children Conceived but Not Yet Born

A conceived child may have inheritance rights if later born alive under the conditions required by law.

This matters when the father dies while the mother is pregnant. The unborn child may be considered in the estate settlement, provided the child is later born in accordance with legal requirements for civil personality.

XXII. Waiver, Renunciation, and Compromise

1. Waiver Before Death

A future inheritance generally cannot be validly waived before the death of the person from whom one expects to inherit. Contracts over future inheritance are generally prohibited except in cases allowed by law.

2. Waiver After Death

After the death of the decedent, an heir may waive or renounce inheritance, subject to formal requirements and effects on creditors and other heirs.

3. Compromise Among Heirs

Heirs may enter into compromise agreements to settle disputes, but such agreements must respect mandatory rules, rights of minors, and legal formalities.

XXIII. Prescription and Laches

Inheritance claims may be affected by prescription, laches, and procedural bars.

A child who believes he or she has been excluded from an estate should act promptly. Delay may complicate recovery, especially where properties have been sold, transferred, or mortgaged to third parties.

XXIV. Practical Checklist for Determining Inheritance Rights

To determine the inheritance rights of legitimate and illegitimate children, ask:

Did the deceased leave a valid will?
What properties are part of the estate?
Was the deceased married at the time of death?
What was the spouses’ property regime?
Who are the legitimate children?
Who are the illegitimate children?
Has filiation been legally established?
Are there legitimated or adopted children?
Are any children deceased, disinherited, incapacitated, or renouncing inheritance?
Are there grandchildren claiming by representation?
Did the deceased make donations during lifetime?
Did any transaction impair the legitime?
Are there debts, taxes, or claims against the estate?
Are all heirs willing to settle extrajudicially?
Are minors or incapacitated heirs involved?
Has estate tax been settled?
Are there pending disputes over marriage, filiation, or property ownership?

XXV. Key Rules to Remember

Legitimate children are compulsory heirs.
Illegitimate children are also compulsory heirs.
Legitimate children generally have a larger inheritance share.
Each illegitimate child’s legitime is generally one-half of each legitimate child’s legitime.
Illegitimate children’s legitime cannot impair the legitime of legitimate children.
Legitimate children inherit equally among themselves.
Illegitimate children inherit equally among themselves, subject to legal proportions.
A will cannot deprive children of their legitime without valid disinheritance.
Filiation must be proven.
A legitimated child is treated as legitimate.
A legally adopted child generally inherits as a legitimate child of the adopter.
Illegitimate children generally do not inherit intestate from the legitimate relatives of their parents.
Donations during lifetime may be reduced if they impair legitime.
Estate settlement must include all legal heirs.
The deceased’s estate must first be determined before shares can be computed.

Conclusion

Philippine inheritance law recognizes the rights of both legitimate and illegitimate children, but it does not treat them equally in all respects. Legitimate children occupy the strongest position among compulsory heirs and are entitled to a larger share of the estate. Illegitimate children, while also protected by law, generally receive one-half of the share of a legitimate child and face additional issues concerning proof of filiation and the legal barrier between legitimate and illegitimate family lines.

In actual estate disputes, the computation of shares is only one part of the problem. The more difficult issues often involve proving filiation, determining the estate’s actual assets, resolving property regime questions, accounting for lifetime donations, identifying all heirs, and ensuring compliance with estate tax and settlement requirements.

Because inheritance rights are highly fact-specific, families dealing with estates involving both legitimate and illegitimate children should carefully examine the Civil Code, Family Code, documentary evidence, property records, and any will or prior transfers made by the deceased.