• Office 3, Island Tower, 239 Salcedo St. cor. Benavidez St., Legazpi Village, Makati City, Metro Manila, Philippines, Metro Manila, Philippines
  • +63 9178974425, +63 9178974425
  • +632 7527529
  • Contact Person Name : Mr. Rainier Mamangun
  • Establishment year : 2004
  • Attorney in main Office : -
  • All Attorney : 1
  • Affiliation : Integrated Bar of the Philippines
    Fraternal Order of Utopia

Firm OverviewContact Us

The LU MAMANGUN & JUCO Law Office is a full-service Philippine law firm involved in Family Law, Civil Law, Criminal Law, Labor Law, Immigration Law, Corporate Law, and special concerns.

In the specific area of Family Law, the Firm handles cases involving child custody; spousal and child support; paternity suits; domestic or inter-country adoption; legal separation; annulment; declaration of nullity of marriage; recognition of foreign divorce; settlement of estate of the deceased; and reprobate of wills, among others.

In the general area of Civil Law, the Firm handles cases involving change of name or correction of entry in birth and marriage certificates; collection of sum of money; breach of contract; torts and damages; and ejectment, among others.

In the area of Criminal Law, the Firm handles the prosecution or defense in cases of Adultery or Concubinage; Bigamy; Anti-Violence against Women & Children; Estafa or Fraud; Theft; Falsification of Documents; Libel or Oral Defamation; Threats; Coercion; Physical Injuries; Bouncing Checks; Violation of the Electronic Commerce Law, and verification of pending cases in court or the prosecutor’s office, among others.

In the area of Immigration Law, the Firm provides assistance and advice in applications for spousal or fiancée visa, Philippine passports, watchlist or hold-departure orders, and dual-citizenship acquisition; verification of derogatory records with the Bureau of Immigration; and preparation of parental travel consent affidavits, among others.

The Firm likewise attends to special concerns such as assistance in securing documentary requirements for marriage; assistance in DNA paternity tests; preparation of pre-nuptial agreements, last will and testament; demand letters, legal briefs or legal advisories; document preparation in real estate transactions; contract drafting and review; verification of titles with the Registry of Deeds; service of summons and notices from foreign courts; and notarial services.

"The passionate pursuit of legal excellence" is the Firm’s guiding theme. The same is evident in all aspects of the Firm's dealings with its clientele, the opposition, the courts of justice, and the public in general.

The partners adhere to the tenet that as lawyers, they should, at all times, observe candor and fairness with their clients and serve them with competence, diligence, and zeal within the bounds of law. The Firm's mission is to pursue its clients’ cause to the utmost of its abilities and, in the process, bring to realization its vision of according dignity to the legal profession and advancing the greater interest of justice.


Area of Practice

Accident and Injuries
Banking and Finance
Business and Commercial
Civil Right
Criminal Law
Estate Planning
Family Planning
Immigration Law
Internet - Cyberspace Law
Litigation and Appeals
Medical Malpractice
Medical Malpractice
Motor Vehicles Accidents - Plaintiff
Personal Injury - Defense
Personal Injury - Plaintiff
Probate and Estate
TrademarksIntellectual Property Law
Real Estate

Lawyer's Profile


Name: Rainier R. Mamangun, Partner


University of the Philippines: Bachelor's degree in Political Science
He served as the Deputy Academic Chairman of the Fraternal Order of Utopia in SY1997-1998 at the Ateneo Law School

Bar Admission:

Admitted to the Philippine Bar in 2001


English & Filipino


10 years of law practice
Formerly a lawyer for the Philippine Department of Foreign Affairs, DFA, worked on labor, civil and criminal cases involving migrant workers and overseas Filipinos in distress. In this connection, he spearheaded various legal missions abroad to such countries as Malaysia, Indonesia, East Timor, Nepal, India, and Saudi Arabia. During his stint with the DFA, he was instrumental in rescuing countless victims of human smuggling and trafficking and in saving the lives of Filipinos on death row abroad
Prior to this, he worked as a legal consultant to the National Federation of Labor Unions, NAFLU, one of the biggest labor federations in the Philippines
In 2003, he was chosen by the Office of the Vice-President of the Philippines to be part of the Drafting Committee composed of distinguished professors of the University of the Philippines Law Faculty and representatives from concerned government agencies to draft the "Magna Carta for Seafarers"-- a bill that aims to promote the welfare of millions of Filipino seafarers worldwide
His experience in dealing with OFW concerns and involvement in the labor movement made him adept at tackling civil, criminal, immigration and labor matters
His skills at legal drafting and the defense of existing legislation were developed through years of service at the Office for Migrant Workers Affairs and in appearances at Congressional hearings and various inter-agency meetings that dealt with law and policy formulation


His work on "The Policies and Laws Governing Filipino Seafarers," co-authored by Dean Merlin Magallona, was published in in 2003 in the official organ of the University of the Philippines College of Law. He likewise authored the article entitled "Comparative Analysis of the Philippine Arbitration Law and the UNCITRAL Model Law on International Commercial Arbitration (Part I)" published at Hieros Gamos.

Clients / Practice

Clients :
The Firm\'s clients include multinational corporations
real estate developers
recruitment agencies
commercial banks
companies engaged in information technology
communications firms
pharmaceutical companies
religious orders and foreign-based individuals and corporate entities
either on a retainer arrangement or per case basis.


Misc. Information

Contact Us