In June 2025, Brazil's Supreme Federal Tribunal (STF) handed down the most consequential platform-liability decision in the country's history. By a wide majority, the court reinterpreted Article 19 of the Marco Civil da Internet — Law 12.965/2014 — to require platforms to act on certain categories of unlawful content (including anti-democratic acts, hate speech, and child sexual abuse material) without waiting for a prior judicial order. Nearly a year later, with the Senate advancing a parallel digital-platform bill and the ANPD ramping up enforcement of the Lei Geral de Proteção de Dados (LGPD), Brazil is running a live experiment on what happens when a country abandons a working intermediary-liability rule before agreeing on what should replace it.
The results, so far, are a cautionary tale for any jurisdiction tempted to follow.
What Article 19 Actually Did
The original Article 19, adopted in 2014 after years of multi-stakeholder negotiation, was widely regarded as one of the world's better-calibrated liability regimes. It said, in essence: a platform is not civilly liable for third-party content unless, after a specific judicial order, it fails to take that content down. The rule applied to ordinary defamation and similar disputes; narrower carve-outs (such as non-consensual intimate imagery under Article 21) already required only notice-and-takedown.
The design was deliberate. By routing contested speech disputes through judges rather than corporate moderation queues, Article 19 protected lawful expression from over-removal while still allowing victims of clear illegality to obtain relief. It was praised by UN Special Rapporteur David Kaye and successive Brazilian digital-rights coalitions as a model for the Global South. The Marco Civil itself — passed under President Dilma Rousseff after the Snowden disclosures — was for years a reference text for proportionate internet regulation.
The STF's June 2025 Ruling
The STF's decision, issued in the joined extraordinary appeals RE 1037396 and RE 1057258 with Justices Dias Toffoli and Luiz Fux as rapporteurs, did not strike Article 19 down outright. Instead, the majority read into it a new affirmative duty: platforms must proactively act on a list of "manifestly illegal" content categories, including incitement to coups and anti-democratic acts, racism, terrorism, and content involving the sexual exploitation of children. Failure to do so can now trigger liability without a prior court order.
The court framed the reinterpretation as a response to the events of January 8, 2023, when crowds attacked federal government buildings in Brasília after weeks of organising on major platforms. That context is real and the harm was serious. But the legal move is harder to defend.
By converting a clear ex-post judicial rule into a moving ex-ante duty of care defined by judges and regulators, the STF effectively imported a version of Europe's Digital Services Act without the DSA's procedural guardrails — and did so through judicial interpretation rather than legislation. Brazil's Congress, which had spent years debating PL 2630 (the so-called "Fake News Bill") without consensus, was bypassed on a question that is squarely its constitutional remit.
The Compliance Bill, So Far
Twelve months in, the costs are becoming visible. Major platforms have published expanded content-moderation policies and increased Portuguese-language reviewer headcount, but they have also visibly tightened the dial on borderline political speech in the run-up to the 2026 municipal elections. Civil-society organisations including InternetLab and Coding Rights have documented a measurable rise in removals of journalistic and satirical content that should never have been close to the line.
Smaller Brazilian platforms — fediverse instances, regional forums, niche communities — face a starker calculus. They lack trust-and-safety teams capable of evaluating "manifest illegality" at scale, and the liability tail-risk now sits on their balance sheets rather than in a court docket. Several have geo-restricted Brazilian users or moved hosting abroad. That is a classic chilling effect: a rule aimed at the largest incumbents ends up entrenching them, because only they can afford the compliance overhead.
The Parallel LGPD and Senate Tracks
Layered on top, the ANPD has accelerated LGPD enforcement against social networks, with public sanctioning proceedings opened against multiple large platforms in 2025-2026 over targeted-advertising and minor-protection practices. The Senate, meanwhile, has revived elements of PL 2630 and floated new digital-platform competition rules echoing the EU's Digital Markets Act.
Each strand may be defensible in isolation. Stacked together — judicial reinterpretation of intermediary liability, escalating data-protection sanctions, and a fresh legislative push on platform duties — they amount to a compliance regime designed in three uncoordinated rooms. That is precisely the environment in which over-removal flourishes and new entrants do not.
A Better Path
None of this is an argument for inaction on genuinely illegal content. CSAM and credible incitement to political violence are not edge cases; they require fast, effective response. But Article 19 already permitted such response through narrower carve-outs and emergency injunctions, and Brazil already had — in the LGPD, the Marco Civil, and the Penal Code — the substantive law it needed.
The proportionate move would have been legislative: a tightly drawn amendment to Article 19 listing specific categories, defining procedural safeguards (notice, appeal, transparency reporting), and capping liability exposure for good-faith actors. Instead, Brazil now has a court-authored standard whose contours platforms must guess at, enforced against a backdrop of overlapping regulatory threats.
For the rest of the Global South watching Brasília, the lesson is not that intermediary liability cannot evolve. It is that evolving it through judicial reinterpretation, without a clear statutory floor, hands the costs to small platforms and lawful speakers — and the benefits to nobody in particular.