Spain is introducing a strict AI governance law requiring mandatory labeling of synthetic content, complementing the EU AI Act with fines up to 7% of turnover.

The European regulatory landscape for artificial intelligence is shifting from broad guidelines to granular, enforceable mandates. Spain is currently leading a domestic push to refine how synthetic content is identified, introducing a legislative framework that aims to eliminate the ambiguity between human-generated and machine-generated media. This move comes as the broader European Union begins enforcing the AI Act, creating a dual layer of compliance for any business operating within the Iberian Peninsula.

The Spanish push for synthetic transparency

The Spanish government is in the final stages of processing the Organic Law for the Good Use and Governance of Artificial Intelligence. This project, which reached a critical parliamentary milestone on September 2, 2026, focuses heavily on the concept of transparency. The goal is simple: citizens must be able to distinguish reality from fiction at a glance. Unlike general guidelines, the Spanish proposal includes a specific code of good practices that dictates exactly how AI-generated content must be marked.

For text-based content, the law suggests the mandatory use of the letters AI in a specific size and position. The requirements for multimedia are even more stringent. Videos generated entirely by AI must display a warning throughout the entire duration of the playback. In cases where only fragments of a video are synthetic, a warning at the beginning is deemed sufficient. Audio content follows a similar logic, requiring alerts at the start and periodically throughout the piece if it blends real human voices with synthetic ones.

EU AI Act vs. National Legislation

There is a critical distinction between the pending Spanish law and the existing European framework. While the Spanish Organic Law is still navigating the parliamentary process—with amendments being filed through early September—the EU AI Act is already a reality. Specifically, Article 50 of the European regulation entered into force on August 2, 2026.

This European mandate already requires that chatbots identify themselves as such and that deepfakes be explicitly labeled. Furthermore, AI-generated content must be marked in a machine-readable format. This means that while Spain is debating the visual aesthetics of the AI tag (the size and position of the letters), the technical requirement to flag synthetic data is already legally binding across the bloc. Companies cannot wait for the Spanish parliament to vote before implementing these transparency measures.

Prohibited practices and the cost of failure

The Spanish project does not stop at labeling. It seeks to establish a rigorous regime of prohibited practices, targeting the most harmful applications of the technology. The law specifically bans the use of AI for deceptive manipulation intended to nullify a person's will, causing physical or psychological harm. It also prohibits exploiting age or disability to distort behavior, as well as the use of biometric classification and behavioral evaluation to impose unfavorable treatment on individuals.

The financial risks for non-compliance are designed to be deterrents rather than mere costs of doing business. The Spanish framework proposes a sanctioning regime that could see fines reaching 35 million euros or 7% of the company's global annual turnover for the most serious infractions. This complements the EU's own penalty structure, which can impose fines of up to 15 million euros or 3% of global turnover, whichever is higher.

Expanding the net: ChatGPT, Reddit, and Roblox

The pressure on US-based tech giants is intensifying as they cross specific user thresholds within the EU. The European Commission recently designated ChatGPT, Reddit, and Roblox as entities subject to stricter data protection and risk mitigation rules. This is because these platforms have exceeded an average of 45 million monthly users in the EU.

By falling under the jurisdiction of the Digital Services Act (DSA), these platforms are now categorized as Very Large Online Platforms (VLOPs). This status forces them to actively assess and mitigate systemic risks, particularly those concerning the protection of minors, users' mental health, and the spread of illegal content. ChatGPT, in particular, marks a milestone as the first AI chatbot to face the full weight of the DSA, meaning its operational transparency is now under the same scrutiny as social media giants like Meta or TikTok.

The operational burden for SMEs

While the headlines focus on the giants of Silicon Valley, the ripple effect extends to small and medium-sized enterprises (SMEs) and freelancers. The integration of AI into recruitment processes, contract drafting, and customer service has happened faster than the legislation. For a small business, the challenge is no longer just about adopting AI, but about auditing the tools they use.

The question is no longer whether organizations will use AI, but whether they know which tools they employ, for what purpose, and what obligations each specific use generates.

Businesses must now track whether their AI tools provide the necessary machine-readable tags required by the EU or if they need to manually add the AI labels required by the Spanish code of good practices. Failure to do so could expose a small firm to disproportionate legal risks if their synthetic content is reported by a citizen.

Global implications for US and UK enterprises

For entrepreneurs and companies based in the USA or the UK, the Spanish and EU developments signal the end of the regulatory wild west for AI. While the US currently relies more on voluntary commitments and sectoral guidelines, and the UK has pursued a more pro-innovation, less prescriptive approach, the EU's extraterritorial reach is absolute. If a US company provides AI-generated content to users in Spain or the wider EU, they are subject to these laws.

The Spanish model of mandatory visual labeling (the AI tag) could serve as a blueprint for other nations seeking to combat misinformation. US firms should anticipate a fragmented regulatory environment where the EU demands strict transparency and high fines, while other markets remain flexible. To maintain market access, global firms must implement a tiered compliance strategy: the highest standard of transparency (the EU/Spanish model) should be the default for any content distributed globally to avoid the risk of massive turnover-based fines.

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Sources: Malagaes, Moncloa, Ineaf ·