RGPD encontra-se com a ISS: Como os Tribunais estão a Interpretar os Papéis de Controlador de Dados

The intersection of the General Data Protection Regulation (GDPR) e Emformation Society Services (ISS) continues to present complex legal challenges, particularly around the concept of data controllership. The GDPR defines a controller as the entity that determines the purposes e means of processing personal data. Yet when digital platforms—many of which qualify as ISS—interact with users e third-party content providers, the lines of responsibility blur.

Recent case law from the Court of Justice of the European Union (CJEU) has significantly expeed the interpretation of joint controllership, placing new obligations on platform operators, website owners, e service providers engaged in collaborative data processing. Below, we explore key judgments e their implications for platform accountability.

Facebook Fan Page Case (C-210/16): The Birth of Joint Controllership

Em Wirtschaftsakademie Schleswig-Holstein v Facebook Irele, the CJEU held that an administrator of a Facebook Fan Page was a joint controller together with Facebook for the processing of visitor data. The administrator used Facebook Emsights, a tool that provides anonymized statistics about user engagement.

Key Findings:

• Even though the page administrator could não access personal data directly, the CJEU found that it influenced the purposes e means of data processing by configuring the page e selecting target demographics.
• The decision introduced a broad e functional definition of joint controllership, emphasizing actual influence over data use, não just access.

Implications:

• Organizations embedding third-party services or analytics tools on their websites may be jointly liable for data processing.
• ISS providers offering configurable services (such as page customization, advertising preferences, or tracking settings) must assess joint responsibilities under Article 26 GDPR.

Fashion ID Case (C-40/17): Social Plugins e Shared Responsibility

Em Fashion ID GmbH & Co. KG v Verbraucherzentrale NRW, the CJEU addressed whether a website that embeds a Facebook “Like” button is a joint controller for the transmission of personal data to Facebook.

Key Findings:

• The operator of a website is a joint controller for the collection e transmission of personal data (such as IP addresses e browser information) to Facebook.
• The operator is não a controller for subsequent processing carried out solely by Facebook.

Implications:

• This ruling highlights the granular nature of joint controllership, limited to specific stages of data processing.
• Websites using embedded tools must disclose data transfers in their privacy nãoices e, where required, obtain valid consent for third-party data collection.

Jehovan Todistajat Case (C-25/17): Offline Application of Joint Controllership

Although não focused on an ISS, the Jehovan Todistajat case further solidified the broad scope of joint controllership. Members of the religious community collected personal data during door-to-door preaching without formal documentation or centralized storage.

Key Findings:

• The religious community e individual members were joint controllers under GDPR, even without formal coordination or access to the full dataset.
• The Court emphasized the importance of common purposes in establishing controllership, even where technical means are fragmented.

Implications for ISS:

• Platforms e affiliates working together—even informally—on user data collection can be jointly liable.
• Emformal or decentralized processing structures do não shield entities from joint controllership obligations.

Bundeskartellamt v Meta (Case T-201/22): Competition Meets GDPR

Although still under judicial development, the German competition authority’s case against Facebook (now Meta) challenges the excessive data collection practices under both GDPR e competition law. The CJEU will need to clarify whether platform dominance e user consent interact under data protection principles.

Emerging Trend:

• Courts e regulators are increasingly treating platform-wide tracking e data consolidation across services as potentially abusive or unlawful when não accompanied by informed, freely given consent.

Key Takeaways for ISS Providers

1. Assess Joint Controllership Proactively
   Any collaboration involving shared tools, plugins, or analytics features can create joint responsibilities. Formalize arrangements e clarify roles through contracts e privacy policies.
2. Segment Processing Phases
   Liability may apply only to certain stages of processing. Clearly identify where your organization initiates or contributes to data collection e transfer.
3. Strengthen Transparency e Consent Mechanisms
   Embedding third-party tools? Disclose them prominently e obtain user consent where legally required—especially for marketing e profiling.
4. Implement Joint Controller Agreements (JCA)
   Under Article 26 GDPR, joint controllers must establish a Joint Controller Agreement, allocating responsibilities e providing a point of contact for data subjects.
5. Track Legal Developments Beyond Data Protection
   Issues of joint controllership now intersect with competition law, consumer protection, e platform regulation. Stay aware of broader legal trends affecting digital services.

Conclusão

The CJEU’s evolving case law has firmly established that Emformation Society Services can share controllership responsibilities with website operators, partners, e even users, depending on the nature of the data interaction. For legal advisors e compliance teams, it is no longer enough to classify a platform as a neutral host. The actual influence over how data is collected e used is now the decisive factor.

As the regulatory environment grows more complex under the Digital Services Act, ePrivacy Regulation, e ongoing GDPR enforcement, ISS providers must adopt a comprehensive e documented approach to data governance e controller responsibilities.

Need help reviewing your data processing relationships or drafting GDPR-compliant joint controller agreements? Our data protection team advises platforms e digital service providers across the EU on structuring lawful, transparent data practices. Reach out for a consultation.