EU Finalises AI Rules: Watermarking Mandatory but Technology Lags
The European Commission has published final guidance on AI transparency, including requirements for watermarking AI-generated content. Companies have a short window to comply with the new regulations.

What happened?
On 20 July 2026, the European Commission published its final guidelines on AI transparency. These rules mandate that companies using chatbots, generating AI images, or publishing AI-written content for EU audiences must comply with new requirements. Companies have eleven days, until 2 August, to meet the requirements to avoid penalties. Fines can reach 15 million euros or 3 per cent of total global annual turnover, whichever is higher.
Key facts
”The European Commission published its final guidance on AI transparency requirements July 20, 2026 — one day ago — giving every company that runs a chatbot, generates AI images, or publishes AI-written content for EU audiences 11 days to comply or face fines that can reach €15 mi”
”According to Natalia Garina, a legal researcher who analyzed the Code of Practice for Tech Policy Press, no single marking technology currently meets all four requirements Article 50 imposes: effectiveness, interoperability, robustness, and reliability.”
Why it matters
The final guidelines add legal rigour to the previous draft from May 2026, meaning national market surveillance authorities across all 27 EU member states are expected to use them as the primary reference for assessing Article 50 compliance. The challenge lies in the current lack of reliable and universally accepted technology for watermarking AI-generated content that can withstand compression, social media uploads, or screenshots, as required by the legislation.
Who is affected?
Primarily affected are companies developing or using generative AI targeting European users. This includes AI service providers, content creators using AI tools, and digital platforms distributing AI-generated material. End users are also indirectly affected through increased transparency regarding AI content.
Impact on the EU
The rules are directly applicable in all 27 EU member states. They aim to harmonise transparency requirements for AI throughout the union. Although some open-source AI models may be exempt under certain conditions, most commercial AI applications are covered.
What else you should know
According to legal analyses, no existing watermarking technology meets all four criteria set out in Article 50: effectiveness, interoperability, robustness, and reliability. This creates a gap between legislative ambitions and current technical capabilities.
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