KERTESZ

International Law


Specialized advice in international law, family and succession

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Welcome to KERTESZ

International Law

Kertesz Advocacia Internacional, with its own headquarters in the City of Rio de Janeiro and the District of Aveiro in Portugal, began its career working in Portuguese nationality processes.


It is one of the oldest law firms, exclusively for Portuguese nationality law, both in Portugal and in Brazil. Its first headquarters was on Avenida Marechal Câmara, in the center of Rio de Janeiro, where, in the same building, the Consulate General of Portugal in Rio de Janeiro was also located.


His experience in the area is vast, and his legal knowledge is solid. Currently, in addition to representing numerous families in Portuguese nationality processes, its professionals also work in other European Union countries, such as Germany, Austria, Poland and Hungary.


Advice on nationality processes includes assistance in obtaining the documentation required by the competent authorities and monitoring the entire procedural process.

In addition, within the scope of research and searches for ancestors, we locate certificates, naturalization processes, medical records of foreigners, in order to survey the family's entire life history in their country of origin, and in the country of their final destinations.


In addition to nationality processes, Kertesz Advocacia Internacional has lawyers specialized in inventory processes, sharing, ratification of foreign judgments, purchase and sale of properties, and declaratory actions of a civil union in Civil Court.



Countries of operation

In addition to Brazil and Portugal, it operates in several European Union countries, such as Germany, Poland, Austria and Hungary.

Main services


  • Search for birth, marriage or death certificates
  • Advice on nationality processes
  • Advice on marriage and death transcription processes
  • Approval of foreign judgments of divorce, legal separation, recognition of paternity, or adoption
  • Declaratory Action of Stable Union in Portuguese Civil Court
  • Advice on purchase, sale and property leasing
  • Advice on inventory processes for Brazilians with assets abroad, and foreigners with assets in Brazil
  • Brazilian naturalization processes for foreigners
  • Advice for those who wish to change countries, providing information on the immigration process, necessary documents, and investments


certificado com selo vermelho
certificado com selo vermelho

Other services


  • Legal advice in Brazilian and Portuguese Courts in family proceedings, inventories, partitions, divorces, approval of foreign judgments and qualification of heirs
  • Tax consultancy for Brazilians who wish to reside legally in Portuguese territory, as well as mediating the purchase, sale and rental of properties in Portugal
  • Legalization of documents in Brazil and Portugal
  • Issuance of Portuguese Tax Identification Number
  • Translation of documents and certification of translations



Talk to us


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logotipo da empresa kertesz

Responsible Lawyers

Dr. Julia Kertesz


Dr. Nicole Adele Kertesz


Pesquisador Responsável

António Henriques

+351 910 948 991

*(Call to national mobile network)


antoniohenriquesnunes@sapo.pt

Contact information

Uma silhueta em preto e branco de um telefone com uma onda sonora saindo dele.

+351 915 508 521

*(Call to national mobile network)


+351 910 271 080

*(Call to national mobile network)


+ 351 910 948 991 (Search Department)

*(Call to national mobile network)


Rio de Janeiro, Brazil.

+ 5521 3471- 4000

+ 5521 98436 -7249


Um envelope preto com linhas brancas sobre fundo branco.