ANPD Technical Note 39/2024 (Meta AI training case): training a model on data collected for other purposes is secondary use that needs transparency (ANPD, Nota Técnica nº 39/2024/FIS/CGF/ANPD, process 00261.005032/2024-14, para. 9.1.5 (enforcement staff note))
In plain English: the ANPD staff note treats training a generative AI model on data collected for other purposes as a secondary use that, without clear prior notice, would in theory breach good faith, purpose and transparency, while saying legitimate interest (Art. 7 IX with Art. 10) could in theory support training where safeguards work and the model does not aim to identify people. It is a staff note in one enforcement case about public social media posts, not a rule for business records, there is no official English text, and on my reading notice plus a working way to object are the minimum for a holder.
Dated 18 Oct 2026Source checked 18 Oct 2026Basis: primary text
In the source's own words
“Desse modo, o tratamento de dados pessoais dos usuários dos produtos da Meta para o treinamento de modelos de IA generativa configuraria utilização secundária de dados coletados para finalidades distintas. Assim, o uso secundário dos dados pessoais compartilhados pelos titulares, ainda que em “contas públicas”, sem a devida transparência, configuraria, em tese, prática irregular de tratamento de dados pessoais, por desrespeitar os princípios da boa-fé (art. 6º, caput, da LGPD), da finalidade (art. 6º, I, da LGPD) e da transparência (art. 6º, VI, da LGPD).”
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