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

Peroni Sosa Tellechea Burt & Narvaja

Paraguay > Corporate and M&A Tier 1

With a client base consisting of major international corporations and key players in the Paraguayan market, Peroni Sosa Tellechea Burt & Narvaja continues to be one of the leading firms in the corporate and M&A practice area. The full range of corporate matters are handled by the team and it continues to be involved in recent agribusiness and mining projects, as well as handling matters in the aviation sector. Practice head Esteban Burt has more than forty years of experience in the legal market, and continues to lead the team in major M&A projects and complex corporate structuring and restructurings. Francisco Peroni specialises in negotiating complex distribution, representation and agency agreements, while Victoria Burt heads the firm’s compliance practice. At the associate level, Vanessa Oddone has continued to work with key corporate clients, while expanding her focus to bitcoin and data centre business matters, and Estefania Elicetche has worked in significant cross-border transactions, including foreign investments.

Practice head(s):

Esteban Burt


The firm stands out in the local law market for the commitment and responsiveness of its members.

I have worked closely with Garciela Narvaja and Esteban Burt. Both are remarkably proficient, and the latter has an outstanding business-oriented insight.

Work highlights

  • Advising Lawen Resources and IGC Group of Guatemala on the acquisition of Azucarera Iturbe, an inactive sugar mill and an ethanol distillery, and on the project to transform it into an operating unit.
  • Advised UABL on the restructuring of the company’s net worth through the capitalisation of profit and loss accounts and loss absorption, in a $110m operation.
  • Advising Penguin Infrastructure on the construction of the biggest data centre in Paraguay to provide hosting services to bitcoin mining companies and cloud companies.

Paraguay > Dispute resolution Tier 2

Peroni Sosa Tellechea Burt & Narvaja represents clients in civil, commercial, administrative and family courts. The firm has experience in representation, agency and distribution litigation, assisting with the resolution of conflicts between foreign companies and their local representatives or distributors. The firm handles lawsuits for civil damages and tort law, as well as advising on real estate and insurance litigation, and on bankruptcy and debt restructuring matters. The team is made up of experienced litigators, led by José Sosa Gustale, José Luis Vega Meza, who focuses on the insurance and reinsurance sector, and José Sosa Fracchia, who actively advises local and international clients on litigation matters, with particular experience in cases involving foreign parties, agribusiness disputes, distribution law, and national and international arbitration.

Practice head(s):

José Sosa Gustale; José Sosa Fracchia; José Luis Vega Meza

Key clients

Asociación Paraguaya de Compañias de Seguros

Banco Nacional de Fomento


Catlin Re Schweiz

Cervecería Paraguaya

DVA Agro Paraguay

Euler Hermes Seguro de Creditos

Fenix Trading

Galerias Guarani

Husqvarna Motorcycle

Mapfre Paraguay Compañía de Seguros

Marubeni America

Meatstart NV

Merco Par


Sancor Seguros del Paraguay

Touax Hydrovia

Willis Towers Watson Corredores de Reaseguros

Zurich ReInsurance

Work highlights

  • Assisting Riverpar with a claim initiated by River Services claiming a wage for assistance and salvage arising from an accident.
  • Acting for UCC Ueshima Coffee in a labour and civil lawsuit where the plaintiff sued UCC as a former shareholder of Companía Agropecuaria Yguazú.
  • Representing Mundial in a $1m claim for damages for the termination of a distribution contract brought by Texo Industries.

Paraguay > Environment Tier 3

The environment team at Peroni Sosa Tellechea Burt & Narvaja advises clients on environmental liability issues, environmental plans, licensing, and permissions and authorisations from various authorities, particularly in acquisition transactions. Practice co-head José Sosa Fracchia has over 20 years as a litigator, and the team regularly assists with environmental disputes, including civil and administrative proceedings and environmental litigation. He leads the team alongside Juan Carlos Boggino, who has extensive experience in disputes and regulatory issues and often represents clients in complex environmental controversies. Senior associate Horacio Peroni advises on regulatory issues and disputes in the practice area.

Practice head(s):

José Sosa Fracchia; Juan Carlos Boggino


Immediate attention and very good results.


Key clients

El Precursor

Work highlights

  • Assisting El Precursor with a $6.5m land sale agreement, which involved solving and carrying out administrative procedures before the environmental authority.

Paraguay > Intellectual property Tier 3

Peroni Sosa Tellechea Burt & Narvaja‘s IP team is made up of highly experienced IP specialists, who advise national and international clients on trade marks, patents, utility models and designs to registration and commercial use in Paraguay. The firm offers advice on concessions and licensing of brand name products, services and drafts, registration of distribution, representation, and agency rights contracts. The team also handles contentious matters, including litigation and opposition matters. Practice head Elba Britez de Ortiz has nearly 50 years of experience in the IP practice area and leads the team alongside Mariana Peroni and Juan Ortiz Britez, an IP specialist with over 20 years experience.

Practice head(s):

Elba Britez de Ortiz; Mariana Peroni; Juan Ortiz Britez


‘We have been working with Peroni Sosa for many years, they are excellent professionals, agile, responsible and have affordable costs. We have worked with other law firms but with Peroni Sosa we feel more comfortable because of their way of working.’

‘They are responsible, agile and work very well. We have never had problems with any trademark or patent process. Outstanding associates are Juan Ortiz and Elba Britez.’

Key clients


Ab/Inbev (Holding)


Banana Republic

Banco Atlas


Licensing Services



Toy Cantando






Grupo Televisa

Laboratorios Bagó

Mary Kay

National Academy of Recording Arts & Sciences (Grammys)

PI Industries



Sumitomo Chemical Company

TOE I Animation



Vicente Scavone & Cia

Work highlights

  • Represented Starbucks in a range of matters, including a market investigation regarding infringement of trade mark registrations.
  • Managing AB InBev’s trade mark portfolio.
  • Advised Grupo Televisa on a settlement agreement with Disney Enterprises and have withdrawn the oppositions against its trade mark applications.

Paraguay > Labour and employment Tier 3

Peroni Sosa Tellechea Burt & Narvaja handles both contentious and non-contentious labour and social security matters. The firm offers day-to-day advice, as well as assisting clients with the labour aspects of mergers and takeovers. The labour practice frequently advises clients on labour relations, including union organisation, issues related to minimum wage and the drafting of internal regulations and collective contracts. Labour disputes are also an active area, clients from a range of sectors instructing the team, with a notable number of clients from the maritime transport industry. Ernesto Fiore leads the team, with almost 20 years’ experience handling a wide variety of labour matters, from collective bargaining, to claims related to workplace harassment, employment discrimination, and dismissals.

Practice head(s):

Ernesto Fiore


They demonstrate a complete knowledge of the labour and immigration legislation of the country, and have a very good approach to all requirements made. They support us with clear and simple advice to understand local regulations.

We appreciate their clarity and good disposition.

Key clients

Asociación Evangélica de Asambleas Bíblicas de Paraguay

Avanza Paraguay

British Embassy in Paraguay

Embajada de Argentina en Paraguay

Essentra Products

Fundacion Moises Bertone

Hidrovias do Brasil

Imperial Shipping Paraguay

Independencia Shipping Lines

Margarita – Hotel las Margaritas


Naviera Conosur

Obras Terminales y Servicios

Petra Emprendimientos

Philip Morris Paraguay

Santa Felicia – El Peruano

Terminal Occidental (Tosa)

Transporte Aereos Del Mercosur

UABL Paraguay


Work highlights

  • Assisted Atria with obtaining the suspension of labour agreements due to force majeure.
  • Representing Asociación Evangélica de Asambleas Bíblicas del Paraguay in a series of lawsuits filed by former employees of a school called Centro Educativo Nandejara for alleged non-payment of wages, worth more than $5m.
  • Assisted Tsuneishi with a due diligence in order to verify the company’s compliance with labour regulations.

Paraguay > Banking and finance Tier 4

The banking and finance team at Peroni Sosa Tellechea Burt & Narvaja advises foreign financial institutions, including investment banks and credit institutions, on the establishment of operations in Paraguay. Practice head José Luis Vega Meza has extensive experience in the insurance sector, assisting insurance and reinsurance companies with authorisations, compliance matters and potential disputes. Graciela Narvaja's range of clients includes private equity firms, multilateral institutions, and national and international corporate clients.

Practice head(s):

José Luis Vega Meza

Key clients


Banco Itaú Unipersonal


Lloyd Bank

Macquarie Group

Sancor Seguros

UBS Bank


Zurich ReInsurance

Work highlights

  • Advising Lawen Resources and IGC Group of Guatemala on the acquisition of Azucarera Iturbe.
  • Advising Penguin Infrastructure on the construction of a data centre in Paraguay to provide hosting services to bitcoin mining companies and cloud companies.

Paraguay > Tax Tier 4

Peroni Sosa Tellechea Burt & Narvaja regularly advises clients on tax structures for corporate transactions. The team has experience in international taxation, including transfer pricing, and has participated in tax controversies, handling double taxation queries, litigations and audits. The team is co-led by Juan Carlos Boggino, who has extensive experience in the practice area and focuses on custom controversies, tariff classifications and regulatory work. Senior associate Horacio Peroni co-leads the team and is praised by clients for his 'extraordinary' communication and services: he has experience in disputes and regulatory matters, and designs efficient fiscal structures for acquisitions.

Practice head(s):

Juan Carlos Boggino; Horacio Peroni


We deal with Horacio Peroni. We think he is an excellent professional, and the communication and services are extraordinary.

Good synergy between the head lawyers. Comprehensive attention to the client’s account and specialists in the tax area.

Personalized attention. In-depth understanding of the problem raised. Effective guidance and advice. Oriented to the result in favor of the client. Friendly treatment. The lawyers with whom I deal in the tax area Juan Carlos Boggino and Horacio Peroni.

Key clients

El Precursor

Guyracampana Agropecuaria y Forestal

Cervecería Paraguaya

CAA Guazú

Cofco International Services Paraguay

Cofco International Paraguay


Work highlights

  • Representing Cofco Group in 19 claims against the tax administration for the refund of tax credits.
  • Advised Cervecería Paraguaya on a claim before the national customs office that allowed it to obtain the 0% customs tariff for the importation of malt to Paraguay.
  • Advised El Precursor on the design of the most efficient tax structure for the sale of real estate assets.

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:
Other fee-earners : 15
Total staff : 34
Insuralex (Global Insurance Lawyers Group)
Lex Mundi
Partners : 19