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Citizenship and Residence by Investment

An analysis of EU and International Law in investment migration programmes

by Daniel Braga Nascimento (Author)
©2026 Thesis XXII, 256 Pages

Summary

Citizenship by investment and residence by investment are forms of acquiring citizenship and residence due to an injection of money into a country. Born in the Caribbean, the practice of selling citizenship arrived in Europe and has sparked particular attention in the case of Malta. However, more than 20 Member States have residence by investment schemes in their legislation. In recent years, European institutions have argued against citizenship by investment, that these programs lack a genuine link, pose different risks, and should be phased out. This book seeks to answer the following question: To what extent do residency and citizenship by investment programs comply with European and international law? Using case studies, legislation, and principles of European law, analysis of case law and international courts, and national legislation from Malta and Portugal the book presents a historical overview of investment migration and an in-depth analysis of European and international Law on the subject.

Table Of Contents

  • Cover
  • Title Page
  • Copyright Page
  • Contents
  • Figures
  • Tables
  • Abstract
  • Acknowledgements
  • List of Abbreviations
  • Table of Cases
  • Introduction
  • 0.1 State of the Art
  • 0.2 Research Problem
  • 0.3 Research Question
  • 0.4 Methodology
  • Chapter 1: What is Residence and Citizenship by Investment?
  • 1.1 Description of the Two Case Studies
  • 1.2 The case of Portugal (Residence by Investment)
  • 1.2.1 The Context of the Drafting of the Law That Created the Portuguese Golden Visa
  • 1.2.2 The Options of Investment
  • 1.2.3 The Way to Citizenship: Naturalisation When in Possession of a Golden Visa
  • 1.2.4 The National Debate on the Golden Visas
  • 1.2.5 The Changes from Decreto Lei n. 14/2021
  • 1.2.6 The War in Ukraine and Russian-Portuguese
  • 1.2.7 The (Near) End of the Scheme in 2023: Turbulence and Uncertainty for Portugal’s Golden Visa Programme
  • 1.2.8 Conclusion: Residence by Investment in Portugal
  • 1.3 The Case of Malta (Citizenship by Investment)
  • 1.3.1 Not Investment but Exceptional Service: The Second Version of the Scheme and its Changes in 2020 (2020–2024)
  • 1.3.2 General Immigration Policies in Malta
  • 1.3.3 The Legal System in Malta and Citizenship Law
  • 1.3.4 General Rules on Naturalisation in Malta
  • 1.3.5 The First Version of the Scheme: From its Inception to its Changes – Individual Investor Programme (2013–2019)
  • 1.3.6 Discussion of the Scheme in the Literature
  • 1.3.7 National Case Law Related to the IPP
  • 1.3.8 Welcoming and Non-Welcoming: Comparing Policy for Asylum Seekers and Investors
  • 1.3.9 The National Environment Against/In Favour of the Citizenship by Investment Scheme
  • 1.3.10 Conclusion: Maltese Citizenship by Investment
  • 1.4 Conclusion of Chapter 1
  • Chapter 2: EU Citizenship & EU Competence: The Reactions from European Institutions
  • 2.1 The Concept of Citizenship
  • 2.2 The Phenomenon of Dual Citizenship
  • 2.3 Citizenship of the European Union
  • 2.4 The Principle of Conferral and the Allocation of Powers Between the EU and its Member States
  • 2.5 Competence on Matters of Naturalisation
  • 2.5.1 Is the EU Competent for Naturalisation Matters? Article 5 (1) TEU
  • 2.6 Competence in Matters of Immigration
  • 2.7 Accessing the Legality of RBI and CBI by Analysing the European Court of Justice’s Decisions on Citizenship
  • 2.7.1 The Principle of Sincere Cooperation
  • 2.7.2 The Court of Justice of the European Union
  • 2.8 Previous Allegations on Matters of EU Law and Incompatibility with EU Citizenship
  • 2.8.1 Prohibition of Additional Conditions for Recognition of Naturalisation by Other Member States and Due Regard to EU Law (Micheletti)
  • 2.8.2 Mass Naturalisation (Rottmann)
  • 2.8.3 Prior Consultation on the Naturalisation of a Large, Disproportionate Number of Non-EU-Citizens (Rottmann)
  • 2.8.4 Tjebbes and the Court of Justice Challenging Member State Sovereignty in Nationality Law (M. G. Tjebbes and Others v Minister van Buitenlandse Zaken)
  • 2.8.5 Citizenship of the Union and the Proportionality Principle in Revocation of Nationality (JY v Wiener Landesregierung)
  • 2.8.6 Notes on the Case Law of the European Court of Justice: From Micheletti to JY
  • 2.9 Current Allegations on Matters of EU Law and Incompatibility of Naturalisation by Investment (CBI)
  • 2.9.1 The Principle of Sincere Cooperation and Mass Naturalisation (Rottmann)
  • 2.9.2 The Principle of Sincere Cooperation and Previous Consultation with Other Member States and the Commission on Naturalisation of a Large, Disproportionate Number of Non-EU Citizens (Rottmann)
  • 2.9.3 The Rottmann Case and the Principle of Proportionality in Deprivation of Citizenship
  • 2.9.4 The Principle of Sincere Cooperation and the Argument of Free Riders (Syndicat interprofessionnel de défense du fromage Morbier contra Société Fromagère du Livradois SAS)
  • 2.10 Previous Allegation of Violation of EU Law in Matters of Residence Permits for Third-Country Nationals
  • 2.10.1 Community of Portuguese Language Countries (CPLP) Mobility Agreement With EU Law
  • 2.11 Current Allegations on Matters of EU Law and Incompatibility of Residence by Investment (RBI)
  • 2.11.1 Residence by Investment and Compatibility with the Long-Term Directive
  • 2.12 Concerns of European Institutions: Money Laundering, Corruption, Lack of Transparency, and Due Diligence
  • 2.12.1 Protecting EU Citizenship: The Commission Referral of Malta to the European Court of Justice
  • 2.12.2 The Commission Recommendations of 28 March 2022 and the Principle of Non-Discrimination
  • 2.13 The Parliament Resolution on 2022 and the Future of Investment Migration in Europe
  • Chapter 3: The Portuguese and Maltese Schemes Considering the Nottebohm Case and International Legal Considerations
  • 3.1 What is the Genuine Link: The Nottebohm Case
  • 3.1.1 Background and Circumstances of the Case
  • 3.1.2 The Decision
  • 3.1.3 The Dissenting Opinions
  • 3.1.4 The Criticism of the Judgement
  • 3.2 The Case’s Reception and Application
  • 3.2.1 Nottebohm Dismissed: Flegenheimer Case
  • 3.3 Nottebohm Partly Accepted: Iran–US Claims Tribunal & Mergé Case (United States v. Italy)
  • 3.3.1. An Iran–United States Claims Tribunal
  • 3.3.2. B Mergé Case (United States v. Italy)
  • 3.4 The EU Application of the Case
  • 3.5 Is the Genuine Link the Way Forward?
  • 3.5.1 Olympic Citizenship
  • 3.5.2 Descendants of Sephardi Jews in Portugal and Spain
  • 3.5.3 Reparatory Citizenship in Germany
  • 3.5.4 Ancestry Naturalisation in Ireland, Hungary and Italy
  • 3.6 Limitations on States with Respect to Citizenship Law in International Law
  • 3.6.1 Statelessness
  • 3.6.2 Non-discrimination
  • 3.6.3 Voluntary Acquisition of Nationality
  • 3.7 Genuine Link is Guidance, Not a Rule
  • 3.8 Political-Theoretical Considerations
  • 3.9 Solutions: EU Regulation or Phase Out
  • 3.10 Conclusion of the Chapter
  • Conclusion
  • Bibliography
  • Appendices
  • Appendix A – Portugal – Raw Data – Lei n. 56/2023, 6 October, 2023
  • Appendix B – Malta – Raw Data – Subsidiary Legislation 188.06, Granting of Citizenship for Exceptional Services Regulations, 20th November 2020 – Legal Notice 437 of 2020
  • Index

Abstract

Citizenship by investment and residence by investment are forms of acquiring citizenship and residence due to an injection of money into a country. Born in the Caribbean countries, the practice of selling citizenship arrived in Europe and has sparked particular attention in the case of Malta. However, more than twenty Member States have residence by investment schemes in their legislation. In recent years, European institutions have argued, against citizenship by investment, that these programmes lack a genuine link (a proper connection between the state and the investor), pose different risks (money laundering, corruption, security, lack of transparency), and should be phased out. This dissertation seeks to answer the following question: To what extent do residency and citizenship by investment programmes comply with European and international law? Using case studies, legislation, and principles of European law, analysis of case law from the CJEU and international courts (the ICJ and arbitral tribunals), and national legislation from Malta and Portugal, the dissertation is divided into three chapters. The first chapter describes the law in Portugal and Malta. Respective laws relate to residence by investment (ARI – Autorização de Residência por Investimento) in Portugal and citizenship by investment (Naturalization by Exceptional Contributions, formerly the “Individual Investor Programme”) in Malta. The second chapter deals with responses from European institutions, such as the European Commission and the European Parliament, and addresses EU law (principle of sincere cooperation, EU Citizenship). The last chapter considers international law using the Nottebohm case, and examines public international law, as well as examples of other naturalisation policies that would be at risk if the theory of the genuine link was understood as a requirement and not as guidance. Finally, the dissertation presents possible pathways for institutions and policymakers to follow.

Keywords: citizenship; EU citizenship; genuine link; investment; residence

Zusammenfassung:

Staatsbürgerschaft durch Investition und Aufenthaltstitel durch Investition sind Formen des Erwerbs der Staatsbürgerschaft und eines Aufenthaltstitels durch Geldzufluss in ein Land. Die Praxis des Verkaufs der Staatsbürgerschaft, die in den karibischen Ländern entwickelt wurde, wurde auch in Europa begründet und erregte im Fall von Malta besondere Aufmerksamkeit. Allerdings haben mehr als 20 Mitgliedstaaten Regelungen für den Erwerb der Staatsbürgerschaft durch Investitionen in ihrer Gesetzgebung. In den letzten Jahren haben europäische Institutionen gegen die Staatsbürgerschaft durch Investitionen argumentiert, dass diesen Programmen ein sog. “genuine link” (eine ordnungsgemäße Verbindung zwischen dem Staat und dem Investor) fehlt, dass sie verschiedene Risiken bergen (Geldwäsche, Korruption, Sicherheit, mangelnde Transparenz) und dass sie auslaufen sollten. Diese Dissertation versucht, die folgende Frage zu beantworten: Inwieweit entsprechen Programme für Aufenthaltstitel und Staatsbürgerschaften durch Investitionen dem europäischen und internationalen Recht? Anhand von Fallstudien, Gesetzgebung und Grundsätzen des europäischen Rechts, einer Analyse der Rechtsprechung des EuGH und internationaler Gerichte (Internationaler Gerichtshof und Schiedsgerichte) sowie der nationalen Gesetzgebung Maltas und Portugals ist die Dissertation in drei Kapitel unterteilt. Das erste Kapitel beschreibt das Recht in Portugal und Malta. Die jeweiligen Gesetze beziehen sich auf den Aufenthalt durch Investitionen (ARI – Autorização de Residência por Investimento) in Portugal und die Staatsbürgerschaft durch Investitionen (Naturalization by Exceptional Contributions, früher das „Individual Investor Programme“) in Malta. Das zweite Kapitel befasst sich mit den Reaktionen europäischer Institutionen wie der Europäischen Kommission und des Europäischen Parlaments und behandelt das EU-Recht (Grundsatz der loyalen Zusammenarbeit, EU-Bürgerschaft). Im letzten Kapitel wird das Völkerrecht anhand des Falls Nottebohm betrachtet und das Völkerrecht sowie Beispiele für andere Einbürgerungsregelungen, die gefährdet wären, wenn die Theorie des “genuine link” als Voraussetzung und nicht als Empfehlung verstanden würde, untersucht. Schließlich werden in der Dissertation mögliche Wege aufgezeigt, denen Institutionen und politische Entscheidungsträger folgen können.

Schlüsselwörter: Staatsbürgerschaft; EU-Staatsbürgerschaft; “genuine link”; Investition; Aufenthaltstitel

Acknowledgements

I thank my supervisor Prof Dr Anuscheh Farahat, for the precise feedback and guidance and unconditional support throughout all my projects during the PhD. Thanks also to the team in Erlangen-Nuremberg and the broader family from the Faculty of Law, Master’s in Human Rights, and PhD in Human Rights and Business programmes. Conducting the PhD at FAU also improved my skills through the Language Centre, the Writing Center, and the Career Center. Thank you to the Welcome Center who made the journey in Germany smoother at every stage.

My researcher training was also helped by the two years during which I taught seminars on international migration law and decolonising human rights on the Human Rights MA. I had thirty international students who taught me a lot about intercultural communication and dialogue related to research in the two fields.

I am also grateful for the several scholars with whom I had the chance to discuss my research individually. I am likewise thankful for the seminars in Bergen (Netherlands), with the Amsterdam migration law team, and in Brussels (Free University of Brussels) at the PhD seminar of the Odysseus Network of EU Migration and Asylum Law.

Thank you to the Friedrich Ebert Stiftung for the PhD scholarship.

Finally, and most importantly, thank you to my parents, who have supported me unconditionally throughout my journey, my partner for the words of encouragement and love, and all my friends who have given me the strength to write a PhD, partly during a pandemic, in another country and in a language other than that allocated me by the lottery of birth.

Abbreviations

Table of Cases

Alphabetical list of all cases

International Arbitration

Flegenheimer Case – Decision No. 182, Reports of International Arbitral Awards (20 September 1958)

Iran–United States Conciliation Commission

Iran v. United States, Case No. 32-A/18-FT, 5 Iran–US Claims Tribunal Reporter 251

Details

Pages
XXII, 256
Publication Year
2026
ISBN (PDF)
9783631942857
ISBN (ePUB)
9783631942864
ISBN (Hardcover)
9783631942154
DOI
10.3726/b23176
Language
English
Publication date
2026 (April)
Keywords
European Court of Justice Nottebohm case Passport Portugal Malta European Law Genuine Link Investment migration Residence by Investment Citizenship by Investment
Published
Berlin, Bruxelles, Chennai, Lausanne, New York, Oxford, 2026. xxii, 256 S., 2 s/w Abb., 6 Tab.
Product Safety
Peter Lang Group AG

Biographical notes

Daniel Braga Nascimento (Author)

Daniel Braga Nascimento studied law and holds a master’s degree in law (LL.M.) and an Erasmus Mundus Joint Master’s: European Master in Migration and Intercultural Relations (EMMIR). From 2020 to 2025, Daniel completed his doctorate at Friedrich-Alexander University Erlangen-Nuremberg (FAU), where he also worked as a research assistant. In 2022, he received a doctoral scholarship from the German Federal Foreign Office.

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Title: Citizenship and Residence by Investment