Legal excellence with a human touch
Lawyers you can trust in Portugal
Immigration and Portuguese citizenship, criminal defence and corporate law, in person or fully remote, wherever in the world you are.
- Registered with the Portuguese Bar Association
- Service in English, worldwide
- Monday to Friday, 9:00 to 18:00
15+
years of international practice
1000+
cases handled
PTBRUSA
international practice in multiple countries
100%
professional secrecy, always
Practice areas
Immigration & visas
The whole journey of moving to Portugal, from the right visa to a residence permit, handled remotely wherever you are.
- · D7 and digital nomad visas
- · Work and entrepreneurship visas
- · Residence permits and renewals
- · Family reunification and appeals
Portuguese citizenship
An EU passport for you and your family, through the right legal route, with the file assembled properly from day one.
- · By marriage or de facto union
- · By descent: children and grandchildren
- · By time of legal residence
- · Updated for the 2026 Nationality Law
Criminal defence
Strategic defence at every stage of Portuguese criminal proceedings, with urgent matters always first.
- · Detention and first interrogation
- · Extradition and European Arrest Warrant
- · Economic and financial crime
- · Trial and appeals
Companies & founders
Legal support for companies and entrepreneurs, including founders arriving in Portugal to build a business.
- · Company formation and registrations
- · Shareholder agreements and contracts
- · Disputes and ongoing counsel
- · The founder’s visa handled together
Who handles your case
Law is trust. Before you send us your case, know who will be looking at it.

Lawyer · Founding partner
Dr. Klaus Luchtenberg
A multi-jurisdictional lawyer and executive, specialised in criminal and immigration law, with over 15 years of experience across Brazil, Portugal and international markets, and cases handled in the United States as well. Licensed to practise law in Portugal and Brazil.
Lead counsel in complex proceedings of international reach, from cross-border drug trafficking to aggravated fraud and money laundering, with a specialisation in extradition.
To that path he adds solid experience in business management, corporate structuring, labour law and international operations, both advising clients directly and inside corporate strategy.
- Portuguese Bar Association · bar ID 58.638/L
- Brazilian Bar Association (OAB) · 40.102/SC
- Specialist in extradition and the European Arrest Warrant
- Cases in Portugal, Brazil and the United States

Founding partner · International legal consultant
Jeff Silva
The bridge between those arriving and the Portuguese system. He follows people who move countries, invest or open businesses in Portugal, from the first contact to the decision, translating bureaucracy into clear steps.
A law graduate of Universidade Autónoma de Lisboa, he specialised in immigration and corporate law, exactly the two subjects of anyone building a new life in another country. A postgraduate degree in Sports Law adds the experience of international proceedings involving athletes and clubs.
In the firm’s criminal cases he acts as an expert in the legal analysis of economic crime, from aggravated fraud to money laundering, preparing the defence strategy alongside Dr. Klaus.
- Expert in legal analysis of economic crime
- Law degree, Universidade Autónoma de Lisboa
- Specialist in immigration and corporate law
- Postgraduate degree in Sports Law
Remote consultations
Professional counsel from the comfort of your home
Whether you are in London, Miami, Dubai or anywhere else, your case is handled by video call and WhatsApp with the same rigour as an in-person meeting. Documents, powers of attorney and signatures are dealt with remotely, and the process moves forward without you having to travel to Portugal.

The firm
JK Law Advogados works with individuals, families and companies, in Portugal and abroad, and with foreign lawyers and advisors who need acts performed by counsel admitted in Portugal.
JK Law Advogados
Av. de São Miguel 296, atelier 10, CW-1
2775-750 Carcavelos, Portugal
+351 914 383 971
geral@advogadoonline.pt
Monday to Friday, 9:00 to 18:00