Artificial Intelligence in Greece

User transparency in Greece

Article 50 of the EU AI Act sets out transparency obligations for providers and deployers of certain AI systems, which include that:

  • Article 50(1): providers of AI systems must ensure that natural persons using an AI system are informed that they are interacting with an AI system unless this is obvious to the natural person (this obligation excludes AI systems authorised by law to detect, prevent, investigate, or prosecute criminal offences).
  • Article 50(2): providers of AI systems, including general-purpose AI systems, generating synthetic audio, image, video, or text content must ensure that the outputs are marked in a machine-readable format and detectable as artificially generated or manipulated. This obligation excludes AI systems that perform an assistive function for standard editing, AI systems that do not substantially alter the input data, and AI systems authorised by law to detect, prevent, investigate, or prosecute criminal offences. Providers must also process data in accordance with other relevant EU laws.
  • Article 50(3): deployers of emotion recognition or biometric categorisation systems must inform the affected natural persons.
  • Article 50(4): deployers of AI systems that generate or manipulate image, audio, or video content constituting deepfakes must disclose that the content has been artificially generated or manipulated. For content forming part of an evidently artistic, creative, satirical, fictional, or analogous work or programme, this disclosure must be made in an appropriate manner that does not hamper the display or enjoyment of the work.
  • Article 50(5): deployers of AI systems that generate or manipulate text published to inform the public on matters of public interest must disclose that the text has been artificially generated or manipulated. This obligation does not apply where the AI-generated content has undergone human review or editorial control and a natural or legal person holds editorial responsibility for the publication.

These obligations apply from 2 August 2026 (except for the watermarking obligation under Article 50(2), for which providers of AI systems placed on the market before 2 August 2026 have until 2 December 2026 to comply).

The Transparency Code of Practice, published on 10 June 2026, is a voluntary instrument that sets out practical steps to help providers and deployers of generative AI systems meet the Article 50 transparency obligations. The Code is structured into two sections: Section 1 addresses provider obligations under Article 50(2), covering the marking and detection of AI-generated or manipulated content through machine-readable solutions; Section 2 addresses deployer obligations under Article 50(4) and (5), covering the labelling of deepfakes and AI-generated text published to inform the public on matters of public interest. On 8 July 2026, the Commission concluded that the Code adequately covers these obligations and facilitates their effective implementation.

The Article 50 Guidelines, published on 20 July 2026, provide practical guidance to assist providers, deployers, and competent authorities in ensuring compliance with the Article 50 transparency obligations. The Guidelines clarify key concepts, including what constitutes a directly interactive AI system (such as chatbots), the scope of synthetic content, and the treatment of deepfakes. They also address exceptions for AI systems that perform assistive functions for standard editing, and for AI systems authorised by law to detect, prevent, investigate, or prosecute criminal offences. The Guidelines complement the Transparency Code of Practice and explain how adherence to the Code may be used to demonstrate compliance with the EU AI Act’s requirements.

Under the Digital Omnibus for AI, providers of generative AI systems that were already placed on the market before 2 August 2026 have a four-month transitional period to comply with the Article 50(2) watermarking obligations, ending on 2 December 2026.

User transparency in Greece

In addition to the transparency requirements imposed directly by the AI Act and further elaborated in the European Commission’s soft-law ‘Guidelines on the transparency obligations of providers and deployers of AI systems’, the Greek AI Act Implementation Law establishes a registration obligation for AI systems in the public sector. Before deploying an AI system, public-sector bodies must register it in a centralised registry maintained by the Special Secretariat for Artificial Intelligence and Data Governance. Registration requires detailed information, including the system's purpose, public-interest objective, categories of data processed, technical characteristics and functionalities.

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