Firm Profile > Peroni Sosa Tellechea Burt & Narvaja > Asuncion, Paraguay

Peroni Sosa Tellechea Burt & Narvaja

Corporate and M&A Tier 1

The corporate and M&A practice at Peroni Sosa Tellechea Burt & Narvaja has been established for over 50 years and, with Esteban Burt at the helm, it acts for multinational clients across a wide range of sectors. The team has a particular strength in the transport sector, especially Paraguay's key fluvial transport market, instructing seven major shipping companies. The sizeable department draws on the experience of its partners, including noted compliance expert Victoria Burt, to cover the full range of corporate and commercial advice.

Dispute resolution Tier 2

Peroni Sosa Tellechea Burt & Narvaja's dispute resolution practice is instructed by a prestigious client list of local and multinational companies in both litigation and arbitration. The team covers civil, commercial, administrative, family and labour disputes, and in recent years has demonstrated a particular focus and specialism in distribution-related cases. Practice head José Sosa Fracchia is the key contact.

Environment Tier 2

Peroni Sosa Tellechea Burt & Narvaja's environmental law practice provides a broad service that includes due diligence, legislation consultancy, administrative regulation and licensing advice. On the contentious side, the team is also noted for handling administrative and judicial matters. José Sosa Fracchia and Juan Carlos Boggino are the co-heads of the practice and act for domestic corporations as well as international environmental organisations.

Banking and finance Tier 3

The banking and finance department at Peroni Sosa Tellechea Burt & Narvaja advises its clients on loan agreements, capital markets, investment structuring and financial disputes. Francisco Peroni and Marcos Peroni lead the team, which often represents financial institutions that do not have branches or subsidiaries in Paraguay but offer financing to the Paraguayan government, government agencies or private companies.

Intellectual property Tier 3

The IP team at Peroni Sosa Tellechea Burt & Narvaja acts for a client base of domestic and international companies and advises on a range of services in the area. It demonstrates particular expertise in trade mark and patent registration; the department has the largest domestic trade mark portfolio among Paraguayan firms. Mariana Peroni de Zubiri is the key contact for patent matters and is frequently instructed by regional law firms to file patents on their behalf. Elba Britez de Ortiz is a noted trade mark and IP litigation expert.

Key clients



Vicente Scavone & CIA.

The Gap (ITM)

Balder IP


Productos Farmaceuticos

Goytia & Asociados

Bridgestone Licencing Services

Genomma Lab

Labour and employment Tier 3

The experienced labour and employment team at Peroni Sosa Tellechea Burt & Narvaja assists clients with labour disputes, regulatory counselling and termination of employment. Partner Pelucia Gimenez heads the practice and is the key contact.

Tax Tier 3

The tax department at Peroni Sosa Tellechea Burt & Narvaja is particularly known for investigating tax evasion, assisting on tax rule interpretation and establishing administrative appeals and proceedings. Juan Carlos Boggino focuses on regulatory and administrative matters; Marcos Peroni has a strong background in commercial and corporate law to aid a domestic client base that covers the country's most important industries.

Peroni Sosa Tellechea Burt & Narvaja (PSTBN) is one of the largest and most prestigious firms in Paraguay. Founded in 1968, the firm’s reputation stems from its commitment to serving the needs of clients in diversified areas of specialization. Over the last five decades PSTBN has been an active participant in legal innovation in Paraguay, advising the government on development strategies, working closely with Congress in drafting and enacting new legislation and taking an active role in supporting Higher Education.

PSTBN offers a broad range of legal services for clients involved in international and local transactions in Paraguay. Specialization includes corporate, mergers and acquisitions, foreign investment, distribution law and antitrust, maritime and aviation, telecommunications, banking and international finance, environmental, mineral and oil exploration projects, labor relations, general civil litigation, taxation, regulatory law and counselling before local government agencies and legislative bodies, maquila projects, investment incentives projects, franchising, licensing agreements and intellectual property matters.

Representation in the courts and administrative agencies of the government is an important activity of PSTBN, as plaintiffs or defendants in landmark cases, proof of such is that PSTBN is the only law firm that has had three current and former members elected as Supreme Court Justices.

The intellectual property department, supported by the latest technology, covers every aspect of trademark, copyright and patent practice and commercial use within Paraguay by foreign and local companies.

PSTBN specializes in foreign investments and taxation, and has published important reference books titled Paraguay, Laws and Economy, Commercial and Investment Law (Paraguay), Tax Law Matters, Maquila Regime, etc.

PSTBN was recognized as “Paraguayan Law Firm of the Year” for years 2009, 2012 and 2014 by Chambers Latin American Awards for Excellence.

PSTBN is a member of the prestigious law firm networks such as LEX MUNDI in which is a founding member, MERITAS, CLUB DE ABOGADOS IBEROAMERICANOS and INSURALEX.

Department Name Email Telephone
Managing partner José Sosa Fracchia;
Corporate/Commercial Guillermo F Peroni:
Banking and Finance Graciela Narvaja:
Litigation and Dispute Resolution Jose Sosa Fracchia: jose.sosafracchia
Intellectual Property Elba Britez:
Labor and Employment Ernesto Fiore:
Immigration Jose Luis Vega Meza:
Environment Jose Sosa Fracchia: Jose.sosafracchia
Corporate/Commercial Esteban Burt:
Banking and Finance Marcos Peroni:
Intellectual Property Mariana Peroni:
Photo Name Position Profile
Mr Eduardo Alfaro Parot  photo Mr Eduardo Alfaro Parot Partner.
 Alejandro Raul Arrua  photo Alejandro Raul Arrua Associate
Mr Felix Santiago Bofferon  photo Mr Felix Santiago Bofferon Partner.
Mr Juan Carlos Boggino  photo Mr Juan Carlos Boggino Partner.
Mrs Elba Britez de Ortiz  photo Mrs Elba Britez de Ortiz Senior Partner.
Mr Esteban Burt  photo Mr Esteban Burt Senior Partner .
Miss Estefania Elicetche  photo Miss Estefania Elicetche Partner.
Mrs Graciela Narvaja Jones  photo Mrs Graciela Narvaja Jones Senior Partner.
Mr Juan Ortiz Britez  photo Mr Juan Ortiz Britez Partner.
Mr Guillermo Peroni  photo Mr Guillermo Peroni Senior Partner. 
Mr Francisco Peroni  photo Mr Francisco Peroni Managing Partner. 
Mr Marcos Juan Peroni Clifton  photo Mr Marcos Juan Peroni Clifton Partner. Counsel to foreign and local companies, corporate, M&A, foreign investment, joint…
Mrs Mariana Peroni de Zubiri  photo Mrs Mariana Peroni de Zubiri Partner. 
Mr Enrique Sosa Elizeche  photo Mr Enrique Sosa Elizeche Senior Partner. 
Mr Jose Miguel Sosa Fracchia  photo Mr Jose Miguel Sosa Fracchia Partner. 
Mr Jose Sosa Gustale  photo Mr Jose Sosa Gustale Senior Partner. 
Mr Jose Luis Vega Meza  photo Mr Jose Luis Vega Meza Partner. 
Mrs Lia Zanotti-Cavazzoni  photo Mrs Lia Zanotti-Cavazzoni Partner. 
Other fee-earners : 15
Total staff : 34
Insuralex (Global Insurance Lawyers Group)
Lex Mundi
Partners : 19