Marval O’Farrell Mairal has a diverse fintech offering spanning regulatory and foreign exchange matters, as well as advising on litigation, data protection and transactional mandates; the team is particularly active in the crypto assets and digital payments sectors. Practice head Juan Diehl Moreno is highly experienced in M&A transactions and IPOs, frequently advising on matters involving crypto assets, digital banking and e‑payment platforms. He is supported by associate Pedro Colaneri, who is active on crypto asset mandates, money remittances, foreign exchange matters and the related regulatory considerations. Associate María Manuela Lava further strengthens the team, with a practice covering financings, public offerings and cryptocurrency‑related regulatory compliance work, with a particular focus on capital markets and financial trust matters in the fintech space.
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Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- Juan is very experienced but also open to new ideas. His business-driven approach combined with his technical knowledge is a key element of his practice and where he differentiates from other Argentinian firms.
- Juan Moreno is a go-to lawyer for fintech matters in Argentina. He is very knowledgeable about the market and applicable regulations. He and his team are very responsive and strike a good balance between theoretical and practical advice.
- Juan Diehl is the head of the team, and he has built a team that functions as a true strategic ally of the clients, getting involved in the commercial logic and contributing legal criteria with a business mindset.
- What sets this practice apart is its deep understanding of the intersection between financial regulation and technology, combined with a practical, business-oriented approach. This isn't a team that simply advises on traditional regulatory matters and occasionally handles fintech inquiries; rather, it's a group that has built a distinct identity around this sector.
- Knowledge of the subject.
- Active participation of its members and knowledge of the subject, with the interest of finding practical solutions.
Key clients
- Airwallex Singapore
- American Express
- Astropay (AP Global Corporation)
- Arcos Dorados Argentina
- Axioma Investment
- Banco Inter
- Banco de Valores
- Bank of America
- Bay Treasure Caramel (Lemon)
- BitGetPoland Limited Liability Company
- Bfills
- BRLA Digital (Avenia BRLA)
Work highlights
Advised Hulytego S.A.I.C.’s shareholders on the acquisition of the controlling stake in Hulytego S.A.I.C., and on the subsequent Mandatory Tender Offer, which was successfully completed on December 18th, 2025.
Advised Nexo on its acquisition of 100% of Buenbit, one of Latin America’s fastest-growing crypto platforms.
Provide comprehensive legal advice to MercadoLibre SRL on regulatory, consumer protection, tax, and payments related matters.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Pedro Colaneri
Practice head
Juan Diehl Moreno
Other key lawyers
Pedro Colaneri; María Manuela Lava