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Mariana Ferreira Tiago

Mariana Ferreira Tiago

Associate Lawyer • Lisbon

Mariana Ferreira Tiago is an associate lawyer and has been with Abreu Advogados since 2024, working in the Private Clients & Family Businesses industry.

She specialises in Family and Juvenile Law, advising clients on a wide range of legal issues related to the formation and dissolution of family relationships, both in and out of court.

She also practices in the area of Estate Planning, handling matters involving complex estates, including estate planning, negotiation, organisation, and generational transfer of assets, particularly in the context of structuring family businesses, as well as in estate-related litigation.

Her practice covers both domestic and international legal matters, frequently dealing with personal and property relationships spanning multiple jurisdictions, and is particularly focused on Private International Law.

She also has experience in alternative dispute resolution as a certified mediator, as well as in international commercial arbitration.

She regularly collaborates with law schools, participating as a speaker and juror in oral exams and Moot Courts, particularly in matters of Family and Succession Law, International Law, and Arbitration.

Practice Areas
Tax
Industries
Private Clients & Family Businesses
Languages
English, Spanish
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Experience

  • Representation in family and juvenile cases, including divorce, division of property, establishment, breach, and modification of parental responsibilities, child welfare and protection proceedings, adoption, and international child abduction;

  • Representation in cases involving minors under court supervision;

  • Assistance with pre-marital proceedings and the drafting of prenuptial agreements;

  • Advice on estate planning matters, including probate proceedings for the division of an estate, estate division agreements, preparation of wills, gifts, and other estate planning instruments;

  • Assistance with all procedures related to the post-mortem transfer of assets, such as Stamp Tax filings and the registration of assets;

  • Preparation and review of articles of incorporation, shareholders’ agreements, and family agreements;

  • Representation in proceedings for the recognition and enforcement in Portugal of foreign court judgments and arbitral awards.

Mariana Ferreira Tiago

Education

  • Faculdade de Direito da Universidade Católica Portuguesa

    Law Degree (2023)

  • NOVA School of Law

    Master’s Degree in Litigation and Arbitration (2025)

Associations