AI disclosure requirements in Czechia: what applies since 2 August 2026
The EU AI Act's transparency obligations are a Union-wide regulation, so the substance is the same in Czechia as everywhere in the EU: from 2 August 2026, AI systems that interact with people must disclose they're AI, synthetic media must carry machine-readable marking, and deepfakes and certain AI-generated public-interest text must be labeled. What differs country by country is who enforces it, in what language your users encounter it, and how quickly complaints turn into questions.
Enforcement in Czechia
Czechia's national AI Act implementing law, an "Adaptation Act" prepared by the Ministry of Industry and Trade, was still a draft at the time of review, expected to be adopted during 2026 in time for the Act's 2 August 2026 application date. Under the draft, the Czech Telecommunication Office (ČTÚ) becomes the general market surveillance authority with residual competence for everything not carved out to a sector regulator, the Czech National Bank (ČNB) covers financial services, and the Office for Personal Data Protection (ÚOOÚ) covers data-related AI. The Czech Office for Standards, Metrology and Testing (ÚNMZ) is named for conformity assessment, and the Czech Agency for Standardisation (ČAS) is set to run the national regulatory sandbox. Until enacted, this map is the expected structure, not the final one, but Article 50 itself binds from 2 August 2026 regardless, with the EU's penalty ceiling of €15 million or 3% of worldwide turnover.
The four duties, as they show up on your site
- Article 50(1): chatbot disclosure
- Any AI system interacting with visitors must make that clear no later than the first interaction, in a clear and distinguishable way.A line in your terms doesn't satisfy it.
- Article 50(2): machine-readable marking
- AI-generated audio, images, video, and text must be marked in a machine-readable, detectable format.For generative systems already on the market before 2 Aug 2026, this specific duty has a transition until 2 Dec 2026; the rest does not.
- Article 50(3): emotion recognition & biometric categorisation
- People exposed must be informed the system is operating.
- Article 50(4): deepfake and AI-text labels
- Visible disclosure for deepfakes, and for AI-generated or manipulated text published to inform the public on matters of public interest.
Czechia-specific practicalities
- ČTÚ's expected residual/general competence means most ordinary chatbot-disclosure and AI-labelling questions land with a telecoms-flavoured regulator comfortable with technical checks, not a generalist consumer body
- Sector split matters: an AI feature inside a financial product is heading for ČNB's docket under the draft, not ČTÚ's, map your sector before assuming the general regulator applies
- The ÚOOÚ (data protection office) is competent today under the GDPR for anything personal-data-adjacent, ahead of the Adaptation Act's own timeline
- Keep the Czech-language first-interaction screenshot in your evidence file, dated, alongside your widget settings export
Disclosure language should match your user-facing language. For a site serving Czechia in Czech, a first-message line such as "Komunikujete s AI asistentem" (you're chatting with an AI assistant) is the pattern to aim for, at first interaction, not in obchodní podmínky.
Common questions
Is Czechia's Adaptation Act in force yet?
Not at the time of review, it was still a Ministry of Industry and Trade draft, expected to be adopted during 2026 to align with the AI Act's 2 August 2026 application date. Article 50's duties bind directly under the EU regulation regardless of whether the Czech law has finished its own process.
Which Czech authority would look at an undisclosed AI chatbot?
Under the draft, that's the ČTÚ's general/residual competence, unless your product sits in a carved-out sector like finance (ČNB) or is fundamentally a personal-data question (ÚOOÚ). The draft's structure is the best current guide to who asks first.