Atty. Rainier R. Mamangun

Full-Service Law Firm in Metro Manila, Philippines

Atty. Rainier R. Mamangun

Unit 2305, Antel Global Corporate Center
3 Julia Vargas Avenue, Ortigas Center

Pasig City 1605

Phone+63 (999) 884-3531

Contact Atty. Rainier R. Mamangun  Contact the Law Firm

Other Offices: Cainta  Makati City  Mandaluyong City  Marikina City  Pampanga  

Law Firm Overview

Attorney Rainier R. Mamangun is a senior partner and founder of a full-service law firm based in Pasig City, Philippines. The firm provides legal services in the areas of civil and family law, criminal law, labor and immigration law, corporate law, and special concerns.

The firm handles cases involving such matters as breach of contract, torts and damages, child custody, spousal and child support, domestic or inter-country adoption, annulment, reprobate of wills, visas, passports, dual-citizenship acquisition, legal briefs or legal advisories, document preparation and contract drafting, verification of titles with the Registry of Deeds, service of summons and notices from foreign courts, and notarial service. The firm also provides prosecution and defense of bigamy, anti-violence against women and children, theft and fraud, libel or oral defamation, threats and coercion, physical injuries, violation of the electronic commerce laws, and verification of pending cases in court or the prosecutor’s office, among others.

The firm provides representation and advice in a timely and cost-efficient manner, always with due regard to the quality of service and the specific needs of the client.

Year this Office was Established: 2004

Languages: Filipino, Chinese, English

Areas of Law

Additional Areas of Law: Ejectment; Annulment; Adultery or Concubinage; Bigamy; Anti-Violence Against Women & Children; Falsification of Documents; Threats; Coercion; Bouncing Checks; Violation of the Electronic Commerce Law; Watchlist or Hold-departure Orders.


Rainier Mamangun Mr. Rainier R. Mamangun
Adoption, Child Support, Divorce, Estate and Trust, Family Law


Carla Therese Arriola Miss Carla Therese L Arriola
General Practice

Rianne Mae Bautista Miss Rianne Mae F Bautista
General Practice

Louella Pamela David Ms. Louella Pamela M. David
General Practice



  • Singles for Christ
  • UP Alumni Association
  • Fraternal Order of Utopia
  • Integrated Bar of the Philippines

More Information on Atty. Rainier R. Mamangun

Profile of Attorney Rainier Mamańgun
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Articles Published by Atty. Rainier R. Mamangun

 The Philippine Arbitration Law and the UNCITRAL Model Law

Comparative Analysis of the Philippine Arbitration Law and the UNCITRAL Model Law on International Commercial Arbitration (Part I)

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Atty. Rainier R. Mamangun
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