In the Philippines, a child usually cannot file an infidelity case simply because a parent cheated. Infidelity is mainly a legal issue between spouses, and criminal adultery or concubinage cases can generally be started only by the offended spouse. But a child can have a real legal remedy when the issue is support, neglect, abuse, abandonment, or psychological harm. The correct case depends on what actually happened: unpaid child support, refusal to acknowledge paternity, emotional or physical abuse, denial of financial support, or a parent’s affair causing direct harm to the child.

The Short Answer

A child may have a case against a parent in the Philippines, but the basis is usually not “infidelity” by itself.

Issue	Can the child file?	Usual legal remedy
Parent cheated on spouse	Usually no	Offended spouse may consider adultery, concubinage, legal separation, or VAWC if applicable
Parent refuses to support child	Yes	Petition/action for support in Family Court
Parent denies paternity or does not acknowledge the child	Yes, if filiation must be proven	Action for support with recognition/establishment of filiation
Parent’s affair led to abandonment, neglect, or emotional harm to child	Possibly	RA 9262, RA 7610, custody/protection orders, support case
Parent uses support to control, punish, or deprive the child	Possibly	Anti-VAWC case or protection order, depending on facts
Minor child wants to sue personally	Not alone	Must act through a parent, guardian, guardian ad litem, or authorized representative

The law is more protective of the child’s right to support and safety than of the child’s feelings about a parent’s marital wrongdoing. That distinction is important because many families waste time trying to file the “infidelity case,” when the stronger and more useful case is often support, custody, protection, or child abuse.

Infidelity Is Usually a Case for the Offended Spouse, Not the Child

Under the Revised Penal Code, adultery is committed by a married woman who has sexual intercourse with a man not her husband, and by the man who knows she is married. Concubinage is committed by a husband who keeps a mistress in the conjugal dwelling, has sexual intercourse under scandalous circumstances, or cohabits with another woman. (Lawphil)

But the crucial rule is in Article 344 of the Revised Penal Code: adultery and concubinage shall not be prosecuted except upon a complaint filed by the offended spouse. The offended spouse must generally include both guilty parties if both are alive, and prosecution may be barred if there was consent or pardon. (Lawphil)

This means:

A child cannot normally file adultery against a mother.
A child cannot normally file concubinage against a father.
A child cannot force the innocent parent to file a criminal infidelity case.
A child may be a witness, but not the complainant in the adultery or concubinage case.

For civil family law, sexual infidelity or perversion is a ground for legal separation under Article 55 of the Family Code, but legal separation is still a case between spouses. The child may be affected by the custody and support orders, but the child is not usually the one who files the legal separation case. (Lawphil)

When Infidelity May Still Matter Legally

Infidelity can still become legally relevant if it is connected to another wrong that directly affects the child or the other parent.

For example:

The parent stopped giving school allowance after starting a new family.
The parent abandoned the child and moved in with another partner.
The parent exposed the child to unsafe living conditions.
The parent’s conduct caused serious psychological harm to the child.
The parent used money, custody, or access to the child as a weapon.
The child witnessed repeated violence, humiliation, or abuse in the home.

In these situations, the case may not be filed as “infidelity.” It may be filed as support, custody, protection order, violence against women and children, or child abuse, depending on the evidence.

The Supreme Court has recognized that marital infidelity may amount to psychological violence under RA 9262 when it causes mental or emotional suffering to the protected victim, but the punishable act is the psychological violence—not simply the private moral fact of cheating. (Supreme Court E-Library)

The Child’s Right to Support Under Philippine Law

The strongest legal right in most of these situations is the child’s right to support.

Under Article 194 of the Family Code, support includes what is indispensable for:

food and daily sustenance;
dwelling or shelter;
clothing;
medical attendance;
education;
transportation; and
schooling or training for a profession, trade, or vocation, even beyond the age of majority when appropriate. (Lawphil)

Parents and their legitimate and illegitimate children are obliged to support each other under the Family Code provisions on support. Legitimate children have the right to receive support from their parents, and illegitimate children are also entitled to support in conformity with the Family Code. (Lawphil)

Support Is Based on Need and Capacity

There is no automatic fixed percentage in ordinary child support cases. Philippine courts look at two main things:

The child’s needs School expenses, food, rent, utilities, transportation, medical care, therapy, special needs, and reasonable living expenses.
The parent’s means Salary, business income, properties, lifestyle, bank deposits, vehicles, travel, employment benefits, and other indicators of financial capacity.

Article 201 of the Family Code provides that support is proportionate to the resources or means of the giver and the necessities of the recipient. Support may later be increased or reduced if the child’s needs or the parent’s resources change. (Lawphil)

Support Is Payable From Demand

A very practical rule is often missed: support is demandable from the time the child needs it, but it is generally payable only from the date of judicial or extrajudicial demand. This is why a clear written demand matters. Article 203 of the Family Code also recognizes support pendente lite, meaning temporary support while the case is pending. (Lawphil)

In real life, this means families should not rely only on verbal requests like “magpadala ka naman.” A written demand letter, email, text message, or formal pleading can become important evidence of when support was demanded.

Can a Minor Child Personally File the Case?

A minor has rights, but a minor usually cannot litigate alone. In practice, the case is filed by or with the assistance of:

the other parent;
a legal guardian;
a guardian ad litem appointed for the case;
a DSWD or local social welfare officer in appropriate situations;
a relative allowed by law or court rules; or
another authorized representative.

The Supreme Court in Knutson v. Sarmiento-Flores explained that a minor may sue with the assistance of the father, mother, guardian, or guardian ad litem, and allowed a father to file on behalf of his minor child under RA 9262. (Supreme Court E-Library)

If the child is already of legal age, the child may generally file in their own name, especially for unpaid support during the period when support was properly demandable, recognition of filiation when still legally available, or other personal claims.

Where to File a Support Case

Support and acknowledgment cases usually fall under the Family Court, which is a designated branch of the Regional Trial Court. RA 8369, the Family Courts Act of 1997, gives Family Courts jurisdiction over petitions for support and/or acknowledgment, custody, guardianship, domestic violence, and cases involving children. (Lawphil)

In places where no separate Family Court has been established, designated RTC branches handle these family cases. (Lawphil)

Step-by-Step: What a Child or Representing Parent Can Do for Support

1. Confirm filiation

Before support can be ordered, the child must show that the person being asked to pay is legally the parent.

Common proof includes:

PSA birth certificate showing the parent’s name;
acknowledgment in a public document;
handwritten admission signed by the parent;
messages, emails, photos, school records, baptismal records, insurance forms, or other proof;
proof of open and continuous recognition as the child;
DNA evidence, when relevant and ordered or admitted.

Under Articles 172 and 175 of the Family Code, legitimate and illegitimate filiation may be established through civil registry records, admissions, open and continuous possession of status, or other evidence allowed by the Rules of Court and special laws. (Lawphil)

2. Prepare a written demand

A demand should be specific and practical. It should state:

the child’s full name and relationship to the parent;
the child’s current needs;
the requested monthly amount or expense-sharing proposal;
school, medical, and other recurring expenses;
where payment should be sent;
a reasonable deadline to respond;
a request for retroactive support from the date of demand, if appropriate.

The demand may be sent by personal delivery, registered mail, courier, email, or messaging app, as long as receipt can be proven.

3. Gather expense and income evidence

The court will need more than anger or screenshots of an affair. Prepare documents that show actual support needs and ability to pay.

Evidence of child’s needs	Evidence of parent’s capacity
Tuition statements	Payslips or employment details
Enrollment records	Business permits or business posts
Rent and utility bills	Vehicle or property records
Grocery estimates	Travel, lifestyle, or social media evidence
Medical prescriptions	Bank transfers or remittance history
Therapy or special needs records	Prior support amounts
Transportation costs	Company position or professional practice

4. File the proper case in Family Court

Depending on the facts, the pleading may be:

an action for support;
a petition for support and acknowledgment;
a custody case with support;
a VAWC protection order case with support relief;
a petition involving recognition or enforcement of a foreign support order.

The Family Court may also order support pendente lite, or temporary support while the case is pending. RA 8369 specifically allows Family Courts to order support pendente lite, including salary deduction in civil support actions. (Lawphil)

5. Ask for temporary support when needed

Support cases can take time. If the child needs immediate help for tuition, rent, medicine, or food, temporary support should be requested early.

In practice, the court may require:

verified application or motion;
proof of filiation;
list of monthly expenses;
proof of the parent’s income or capacity;
hearing or comment from the other parent.

6. Enforce the order

If the court orders support and the parent still refuses, enforcement may include:

execution against property;
salary deduction or withholding, if applicable;
contempt proceedings;
enforcement of protection order support provisions in VAWC cases;
coordination with the sheriff, employer, or relevant agency.

Under RA 9262, a protection order may direct the respondent to provide support and may order an appropriate percentage of salary or income to be withheld and remitted directly; failure by the respondent or employer to comply may result in indirect contempt. (Supreme Court E-Library)

When Non-Support Becomes a VAWC Issue

Non-support is not automatically VAWC in every situation. But it may become VAWC when the refusal or insufficiency of support forms part of violence, control, coercion, psychological abuse, or economic abuse against a woman or child.

RA 9262 covers acts that result in or are likely to result in physical, sexual, psychological harm, suffering, or economic abuse against a woman or her child. It also includes depriving or threatening to deprive the woman or her children of financial support legally due, deliberately providing insufficient financial support, and causing mental or emotional anguish through denial of financial support or custody. (Supreme Court E-Library)

A VAWC protection order may include:

no-contact or stay-away orders;
removal from the residence in proper cases;
temporary or permanent custody orders;
child support;
salary withholding;
restitution for actual damages;
DSWD or LGU assistance;
other reliefs necessary for safety. (Supreme Court E-Library)

A BPO, or Barangay Protection Order, may be issued by the Punong Barangay or available Barangay Kagawad and is effective for 15 days. A court-issued TPO, or Temporary Protection Order, is effective for 30 days, while a PPO, or Permanent Protection Order, is issued after notice and hearing and remains effective until revoked by the court. (Supreme Court E-Library)

Can a Child File Against the Mother?

Yes, in the right type of case. Philippine law does not protect only children abused by fathers.

In Knutson v. Sarmiento-Flores, the Supreme Court held that RA 9262 allows a father to apply for protection and custody orders on behalf of his minor child, and that mothers may be offenders in the context of violence against children under RA 9262. The Court stressed that there is no substantial distinction between fathers and mothers who abuse their children. (Supreme Court E-Library)

This matters in real-life situations where:

the mother is the parent refusing support;
the mother exposes the child to abuse, drugs, unsafe partners, or neglect;
the mother uses custody to harm the child;
the father or another guardian is the safer representative for the child.

The case should still be framed around the child’s safety, support, custody, or protection—not merely around blaming one parent for relationship choices.

What If the Parent Is Abroad or a Foreigner?

Support problems are common when one parent is an OFW, immigrant, dual citizen, foreigner, or living with a new family abroad.

Important points:

Philippine family rights and duties bind Filipino citizens even when living abroad under Article 15 of the Civil Code. (Lawphil)
If the parent is in the Philippines or has property, income, employer, or assets here, enforcement is usually more practical.
If the parent is abroad, service of summons, proof of income, and enforcement can take longer.
Foreign documents may need apostille or consular authentication, plus certified translation if not in English.
A foreign support judgment may need recognition and enforcement in the Philippines under the Supreme Court’s Rules on Action for Support and Petition for Recognition and Enforcement of Foreign Decisions or Judgments on Support, A.M. No. 21-03-02-SC. (Supreme Court of the Philippines)
If the matter involves VAWC, RA 9262 allows the court to expedite a hold departure order in cases prosecuted under the law. (Supreme Court E-Library)

A practical bottleneck is collection. Winning a support order is one thing; collecting from a parent who has no Philippine salary, bank account, or property is another. This is why evidence of Philippine assets, employer details, remittance records, business interests, or foreign support orders can be very important.

Documents Usually Needed

Purpose	Documents
Prove identity and relationship	PSA birth certificate, IDs, marriage certificate of parents if relevant
Prove paternity or filiation	Signed birth certificate, acknowledgment, letters, messages, photos, school records, insurance/HMO records
Prove expenses	Tuition bills, receipts, rent, utilities, grocery estimates, medical records, prescriptions
Prove prior support	Bank deposits, GCash/Maya transfers, remittance slips, receipts
Prove refusal or neglect	Demand letter, unanswered messages, admissions, witnesses
Prove parent’s capacity	Payslips, job title, business permits, lifestyle evidence, property records
Prove abuse or psychological harm	Medical certificate, psychological report, barangay blotter, police report, school guidance report
For overseas documents	Apostilled/authenticated documents, translations, foreign court orders

Common Mistakes That Weaken These Cases

Focusing only on the affair

Screenshots of cheating may explain family conflict, but they do not automatically prove child support liability, paternity, or the amount needed. Support cases are won through proof of relationship, need, demand, and capacity.

Waiting too long before making demand

Because support is generally payable only from judicial or extrajudicial demand, delay can reduce recoverable amounts. A clear written demand helps establish the starting point.

Not proving filiation first

If the alleged father is not listed on the PSA birth certificate and never acknowledged the child, the case may need proof of filiation before support can be ordered.

Relying on verbal support agreements

Many parents agree verbally at the barangay or through relatives, then stop paying. Written, signed, dated agreements with clear amounts and due dates are easier to enforce.

Posting accusations online

Publicly posting a parent’s affair, non-support, or private family facts may create privacy, defamation, or child-protection issues. RA 9262 also treats records involving violence against women and children as confidential. (Supreme Court E-Library)

Using the child as leverage

Courts focus on the best interests of the child. A parent who appears to be using the case mainly to punish the other parent may lose credibility, especially in custody-related disputes.

Frequently Asked Questions

Can I sue my father for cheating on my mother?

Usually, no. A child is not the offended spouse in adultery or concubinage. Your mother may have remedies if she is the offended spouse, but your own stronger remedies are usually support, protection, or custody-related if you were harmed or neglected.

Can I sue my father for not supporting me?

Yes. A child has a right to support from parents. If you are a minor, the case is usually filed through your mother, guardian, or another proper representative. If you are already of legal age, you may be able to file in your own name, depending on the claim and timing.

Can an illegitimate child demand support?

Yes. Illegitimate children are entitled to support under the Family Code. But if paternity is denied, filiation must be proven through the birth certificate, acknowledgment, written admission, open and continuous recognition, or other admissible evidence.

Can I file VAWC against my father for not giving support?

Possibly, but not every unpaid support situation is VAWC. It may fall under RA 9262 if the denial of support is connected to economic abuse, control, coercion, psychological violence, or deprivation of support legally due to the woman or child.

Can a child file a case against the mother?

Yes, depending on the facts. A mother can be the respondent in support, custody, protection, or abuse-related cases. The Supreme Court has recognized that a father may file for protection and custody orders on behalf of a child against an abusive mother under RA 9262.

Can the barangay force the parent to pay support?

The barangay can help document complaints, assist in protection orders, and sometimes facilitate settlement in ordinary disputes. But for VAWC protection proceedings, compromise or forced abandonment of remedies is not allowed, and RA 9262 provides specific protection-order procedures.

How much child support can the court order?

There is no universal fixed amount. The court considers the child’s needs and the parent’s financial capacity. Tuition, food, housing, medical needs, transportation, and the family’s financial situation all matter.

Can support continue after the child turns 18?

Yes, in appropriate cases. The Family Code includes education or training for a profession, trade, or vocation even beyond the age of majority, depending on the child’s needs and the parent’s capacity.

What if the parent has a new family and says they cannot support me anymore?

A new family does not erase the legal duty to support an existing child. The court may consider all dependents and the parent’s actual means, but the child’s right to support remains.

What if the parent is abroad?

A case may still be possible, especially if the parent is Filipino, has assets in the Philippines, sends remittances, or is subject to a foreign support order that can be recognized and enforced. The practical challenge is proving income abroad and enforcing the order.

Key Takeaways

A child usually cannot file an adultery or concubinage case against a parent for cheating; those cases belong to the offended spouse.
A child can demand support from a parent under the Family Code.
A minor child must usually act through a parent, guardian, guardian ad litem, or authorized representative.
Support includes food, housing, clothing, medical care, education, transportation, and appropriate schooling or training even beyond age 18.
Support is based on the child’s needs and the parent’s capacity, not on a fixed automatic percentage.
Written demand is important because support is generally payable from judicial or extrajudicial demand.
If non-support is connected to abuse, control, abandonment, or psychological harm, RA 9262 or child-protection remedies may apply.
Infidelity matters legally when it becomes evidence of abandonment, psychological violence, economic abuse, neglect, or harm—not merely because the child disapproves of the parent’s relationship.
Family Courts handle support, acknowledgment, custody, guardianship, domestic violence, and many child-related cases.
For parents abroad or foreign support orders, apostilled documents, proof of income, and recognition/enforcement procedures may become necessary.