Marval O’Farrell Mairal

Founded in 1923, Marval O'Farrell Mairal is the largest law firm in Argentina and one of the leading firms in Latin America. With over 100 years of history, we provide sophisticated advice to domestic and international clients. Marval is the Argentina's leading law firm with more than 300 lawyers who have extensive experience in highly demanding matters and complex international transactions. Marval O'Farrell Mairal has a strong focus on cutting-edge corporate and financial transactions and also has the largest litigation and arbitration practice in the country. Furthermore, our Intellectual Property Department is a leader in its field. We also lead other practice areas, including tax, fintech, labor law, competition law, energy and natural resources, compliance, anti-corruption and investigations, public and administrative law, insurance and reinsurance, telecommunications, media and technology, and real estate and construction.

Representatives

Diego Fernandez

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Publications

• AI-Generated Case Law Citations Under Scrutiny: Lessons from Argentine Judicial PracticeArgentine tribunals have recently addressed a growing concern: legal briefs containing fictitious or erroneous court citations and references, presumably produced through artificial intelligence applications. Decisions from courts in Rosario, General Roca, and Morón establish that while AI assistance in legal drafting is permissible, its deployment without rigorous professional verification violates core ethical duties. These rulings offer valuable guidance on balancing technological innovation with the integrity of legal practice.17 February 2026
• New Cybercrime Prevention and Strategic Cybersecurity PlanThe Plan’s goal is to ensure the safe use of cyberspace.29 April 2025
• The European Commission confirms that Argentina has adequate legislation for the international transfer of personal dataArgentina, along with 10 other countries, receives ratification from the European Union on its adequacy note for the international transfer of personal data from Europe to these countries. After a process that lasted a few years, and which was temporarily interrupted by some pending decisions of the European courts, Andorra, Argentina, Canada, Faroe Islands, Guernsey, Isle of Ma, Israel, Jersey, New Zealand, Switzerland and Uruguay received confirmation of their adequacy note.16 April 2024
• Recommendations for reliable artificial intelligenceArgentine Information Technology Subsecretariat approves a set of recommendations for trustworthy artificial intelligence (“AI”), specifically directed to the public sector.18 September 2023
• Argentina: Ratifies Convention 108+Argentina becomes the 23rd state to ratify Convention 108+.16 June 2023
• Argentina - Changes in the Classification and Ranking for Infringements to the Personal Data Protection LawTrough Resolutions No. 240/2022 and 244/2022 the Agency for Access to Public Information through Resolutions No. 240/2022 and 244/2022 amended the classification and amounts provided by Provision No. 7/2005 and E 71/2016 of the Argentine Direction for the Protection of Personal Data.20 January 2023
• Argentina's Data Protection Authority publishes its 2021 Annual ReportArgentina’s data protection authority, the Agency of Access to Public Information, i.e. the controlling authority pursuant to Data Protection Law No. 25,326, recently published its 2021 Annual Report on the protection of personal data.1 June 2022
• Supermarket chain fined for breach of data security dutyArgentina’s data protection authority, the Agency of Access to Public Information, i.e. the controlling authority pursuant to Data Protection Law No. 25,326, sanctioned Cencosud S.A. for breaching the security duty established in the Personal Data Protection Law No. 25.326 (“PDPL”).25 February 2022
• Ministry of Health of the Province of San Juan Receives Sanction for Database VulnerabilityArgentina’s data protection authority, the Agency of Access to Public Information, i.e. the controlling authority pursuant to Data Protection Law No. 25,326, fined the Ministry of Health of an argenine Province based on their lack of security measures which affected the confidentiality and secuirty of personal data of covid-19 patients.18 October 2021
• Argentina's Data Protection Authority publishes its 2020 Annual ReportArgentina’s data protection authority, the Agency of Access to Public Information, i.e. the controlling authority pursuant to Data Protection Law No. 25,326, recently published its 2020 Annual Report on the protection of personal data.15 July 2021