In the Philippine legal system, the protection of children and the enforcement of parental obligations are governed primarily by the Family Code of the Philippines (Executive Order No. 209) and Republic Act No. 7610 (Special Protection of Children Against Abuse, Exploitation and Discrimination Act). When a parent fails to provide for a child or leaves the family without justification, several legal remedies are available to the aggrieved party.

I. Legal Basis for Child Support

Support (sustento) comprises everything indispensable for sustenance, dwelling, clothing, medical attendance, education, and transportation, in keeping with the financial capacity of the family.

1. The Obligation to Support

Under Article 195 of the Family Code, parents and their children (legitimate or illegitimate) are obliged to support each other. This obligation is:

Reciprocal: Both parents are equally responsible for the support of their children.
Mandatory: Support cannot be renounced or waived in advance. Any agreement to waive future support is void.
Variable: The amount is never final; it can be increased or decreased by the court depending on the "needs of the recipient" and the "means of the giver."

2. Support for Illegitimate Children

Under Article 176 of the Family Code, illegitimate children are entitled to support from their father, provided that filiation (the biological relationship) is recognized. This is established through:

The record of birth appearing in the civil register.
An admission of paternity in a public document or a private handwritten instrument signed by the parent.
In the absence of the above, a court action for compulsory recognition.

II. Actions for Child Support

When a parent refuses to provide support, the following actions may be initiated:

1. Civil Action for Support

A petition for support can be filed in the Regional Trial Court (Family Court) where the child resides.

Support Pendente Lite: While the case is ongoing, the court may issue a provisional order for immediate support to ensure the child's needs are met during litigation.
Execution of Judgment: If the parent still refuses to pay after a court order, the court may issue a writ of execution to garnish wages or attach properties.

2. Criminal Action under R.A. 9262

The Anti-Violence Against Women and Their Children Act of 2004 classifies the "willful deprivation of financial support" as a form of economic abuse.

Penalty: This is a criminal offense punishable by imprisonment.
Protection Orders: A victim may apply for a Protection Order (Barangay, Temporary, or Permanent) which can include a provision for "spousal and child support."

III. Abandonment: Definition and Consequences

Abandonment occurs when a parent leaves the child without any intention of returning or fails to provide for the child’s care and support for an extended period.

1. Legal Presumption of Abandonment

Under the Rule on Commitment of Children, a child is considered abandoned if the parent has left them in the care of another without provision for support for at least six (6) months.

2. Consequences of Abandonment

Loss of Parental Authority: Under Article 231 of the Family Code, the court may suspend or terminate parental authority if a parent excessively neglects or abandons the child.
Adoption: A child who has been legally declared abandoned by the Department of Social Welfare and Development (DSWD) may be cleared for adoption without the consent of the biological parents.
Criminal Liability (R.A. 7610): Article VI, Section 10 of R.A. 7610 penalizes "Other acts of neglect, abuse, cruelty, or exploitation," which includes the abandonment of a child.

IV. Legal Remedies and Procedures

1. Demand Letter

Before filing a formal court case, it is standard practice to send a Formal Letter of Demand for support. Evidence of the parent's receipt of this letter is crucial for establishing the date from which the obligation to pay becomes legally enforceable in court.

2. The Role of the Public Attorney’s Office (PAO)

For indigent litigants, the PAO provides free legal assistance to file Petitions for Support or to initiate criminal complaints for economic abuse.

3. Hold Departure Order (HDO)

In cases where there is a high risk that the erring parent will flee the country to evade support obligations, the court may issue a Hold Departure Order to prevent them from leaving the Philippine jurisdiction.

V. Key Summary Table

Issue	Legal Remedy	Primary Law
Non-payment of support	Petition for Support / Support Pendente Lite	Family Code
Economic Abuse	Criminal Complaint for Economic Violence	R.A. 9262
Abandonment/Neglect	Petition for Involuntary Commitment / Loss of Parental Authority	R.A. 7610 / Family Code
Unrecognized Paternity	Action for Compulsory Recognition	Family Code