One of the most crucial considerations for any claimant – and, in fact, for their lawyers too – before starting proceedings is not just assessing the chances of success on the merits, but enforcement of any subsequent judgment. A judgment without a real means of enforcement could be a hollow victory, expending time and money without providing an effective relief.
For transnational disputes, this question becomes even more pronounced: parties carefully weigh whether a judgment obtained in one jurisdiction will be binding, or even recognised, in another. Against this backdrop, the recent step by Brazil’s Supreme Federal Court takes on particular importance because it directly reconfigures the landscape for those seeking to enforce foreign judgments or administrative orders in Brazilian jurisdiction. In other words, foreign laws and judicial orders do not automatically apply in Brazil, nor do they bind Brazilian companies or affect assets located in the country.
On 18 August 2025, Brazil’s Supreme Federal Court (SFC), in Justice Flávio Dino, made a historic decision: foreign laws, judicial decisions, and administrative acts have no automatic application over Brazilian citizens on Brazilian territory; they only do so if formally adopted or acknowledged by the competent domestic authority.
This judgment followed a petition, presented by the Brazilian Mining Association (Ibram), for an end to Brazilian municipalities’ pursuit of claims overseas concerning the disastrous dam collapses at Mariana (2015) and Brumadinho (2019).
The history
Ibram initiated proceedings in June 2024, asserting that municipalities lack standing to file cases overseas and must rescind contracts with overseas law firms handling such cases. In March 2025, certain municipalities obtained an interim injunction within the High Court in London, an action challenged by Ibram later on before the SFC. The August SFC decision retrospectively declared foreign judgments ineffective and inapplicable in Brazil unless recognised through a domestic process, a step underlining Brazil’s regard for judicial sovereignty.
Why is this relevant?
This is more than a pro forma procedural quirk; it is an assertive declaration of national sovereignty and legal autonomy. By temporarily halting the automaticity of application of extraterritorial norms officially, Brazil shields its citizens, local institutions, and legal apparatus from foreign decisions. For the mining sector in particular, the ruling prohibits Brazilian municipalities from invoking foreign courts to seek compensation for disasters – even those of Shakespearean magnitude – on behalf of their constituents without overt domestic cooperation.
Moreover, the ruling occurs in the backdrop of geo-political tensions, especially between Brazil and the United States. The tensions rose after U.S. sanctions were placed on SFC Justice Alexandre de Moraes under the Global Magnitsky Act, prompting Brazilian authorities to retaliate by highlighting the fact that foreign directives – such as American sanctions – must first pass through domestic law. That stance places Brazilian banks in a vulnerable position, between enforcement of foreign sanctions and upholding the legal sovereignty of Brazil.
The Mariana Proceedings in London
Referring to the Mariana case in the High Court in London, the suit involves Brazilian municipalities prosecuting mining giants, BHP and Vale, for the 2015 dam collapse. That action followed Ibram’s efforts in Brazil to enjoin similar foreign actions. In March 2025, the High Court granted an injunction requiring Ibram to abandon its local petition; however, Brazil’s SFC held that the preliminary injunction of the English court was ineffective. In this judgment, the Brazilian Supreme Court established a rebuttable presumption that foreign law is ineffective in Brazil and declared that such presumption can be rebutted only by an express court order of the Supreme Court.
The Brazilian Supreme Court
This effectively preserves the ability of the municipalities to pursue their claims in London -albeit, crucially, it makes the legal waters of enforcement in Brazil more complex. The decision places any Claimant in a position where judgments overseas might be said to have force in theory, but their application to bind Brazilian persons or entities remains legally untested except for being presented afresh through Brazil’s legal channels.
The road ahead: challenges and uncertainties
While affirming Brazil’s sovereignty in law, this decision brings along multifaceted challenges, most notably in the areas of enforcement, arbitration, and international cooperation:
- Foreign judgment recognition: Brazil’s centuries-long process of homologação, which the Superior Court of Justice (STJ) has used to recognise foreign court decisions, is now facing new challenges. The new ruling has a presumption of ineffectiveness; therefore, parties will be apt to have to rebut that presumption, making the recognition more time-consuming, costly, and laborious.
- Arbitration awards and mediation: Brazil is a signatory to the New York Convention, which provides for enforcement of foreign arbitral awards. But the sweeping language of the SFC ruling – to encompass “any foreign law, court decision, administrative act, or executive order“- raises legitimate questions whether even arbitration outcomes must now be revalidated domestically. The 19 August clarification limited it to foreign courts, but there still is ambiguity.
- Capital market tensions: Brazilian banks and financial institutions are now forced to tread a thin line between obedience to foreign sanctions (e.g., U.S. Treasury directives) and compliance with national law. To comply with one may punish them under the other – a hellish trap that may strangle international business, undermine investor confidence, and create legal fragmentation.
- Diplomatic and legal frictions: The action will precipitate broader diplomatic disputes, particularly with countries whose sanction regimes or court warrants are effectively suspended pending domestic ratification. Brazil may be isolated or retaliated against unless options to more closely synchronise laws or collaborate judicially are pursued.
Conclusion
This ruling of Brazil’s Supreme Federal Court is a turning point in the legal and geopolitical evolution of Brazil. It sends a clear message: Brazil will not accept the extraterritorial application of foreign law or jurisdictions, regardless of what the issue is.
Yet, the decision is not without consequences. By affirming domestic jurisdiction over international adjudication, Brazil boldly moves ahead but now must come to terms with the tough slog of reconciling that principle with the realities of international legal interdependence.
There are a few challenges ahead, not only for those seeking to enforce a foreign judgment in Brazil, but also for those considering the initiation of proceedings against Brazilian parties abroad.
The implications are practical and economic: claimants will not only have to prevail on the merits in foreign courts but must further go through the slow and potentially costly homologação procedure to Brazil’s Superior Court of Justice. That double burden could serve as a disincentive, deterring parties from initiating litigation against Brazilian parties in foreign courts in the first place.
It is early days yet, though. Much will be dependent upon the judiciary’s interpretation and enforcement of this ruling in future cases, particularly in areas such as arbitration, mediation, and enforcement of foreign sanctions. Firms, banks, and foreign investors will need to rethink their risks and re-strategise. Only time will show whether this judgment strengthens Brazil’s position in negotiations with other nations or whether it introduces frictions into its international trade and investment ties.
What is certain is that the argument is far from over. This ruling will set the parameters of Brazil’s legal sovereignty for generations to come, but it will also set, in ways yet not fully revealed, how the country engages with an increasingly interdependent world.
If you would like further information and advice about the impact of Brazil’s Supreme Court judgment on international disputes, please contact one of our Dispute Resolution solicitors by email, or call 03333 231 580.
