joint controller

CJEU C-40/17 Fashion ID 29 Jul 2019

members – 4 min read

You’re a (joint) controller if you use third-party tools on your website that share personal data with the provider – but only for parts where you (jointly) determine purposes and means. If you collect the data, you must inform and get consent, and each controller must pursue a legitimate interest.

Jun 17, 2025

CJEU C-604/22 IAB Europe TC String 7 Mar 2024

members – 7 min read

[Final 🇧🇪 ruling, articles] GDPR definitions are broad: information = personal data if someone can be identified using third-party data. Joint controllership doesn’t automatically cover further processing, but you are one if you set binding rules and jointly decide purposes and means.

May 25, 2025

CJEU C-231/22 Belgian State (Data processed by an official journal) 11 Jan 2024

members – 3 min read

National law can implicitly determine controllership, including for an official journal that only publishes data it receives, even when it doesn't have a legal personality on its own. (But note my comment on this.)

Jan 16, 2024

CJEU C‑683/21 Nacionalinis visuomenės sveikatos centras 5 Dec 2023

members – 4 min read

The definition of 'controller' is broad and you're liable for all processing, done directly or by others on your behalf, including processors. Joint controllership is determined by facts, not contracts. Know your role(s)!

Jan 6, 2024

Denmark DPA: Failure to demonstrate compliance and joint controller with Meta for US transfers

members – 2 min read

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Jun 7, 2023

Denmark DPA criticises cookie consent solution and focus on joint controllership

members – 1 min read

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Nov 16, 2022