The Guardian Investigation Reveals Brands Are Secretly Using AI Influencers With No Disclosure Rules

The Regulatory Gap: UK, EU, and US

United Kingdom — There are no specific rules requiring disclosure of AI-generated advertising content, and the incoming EU AI Act will not apply in the UK . The Advertising Standards Authority has confirmed it has "nothing in our rules" that forces brands to label AI influencers .

European Union — The EU Artificial Intelligence Act, Article 50, will start applying in full across all sectors from August 2, 2026 . It requires AI-generated or manipulated content such as deepfakes to be clearly labelled in both machine-readable and human-readable form. Providers of AI systems must mark synthetic outputs, and deployers — including brands and agencies — are responsible for compliance .

United States — The FTC has been escalating enforcement since 2024. Key milestones include:

• Late 2024: First enforcement actions against AI-generated testimonials
• Mid-2025: Updated Endorsement Guides covering synthetic media
• Early 2026: Finalized rules on "AI Transparency in Advertising"
• May 2026: Published updated AI endorsement guidance specifically addressing synthetic influencers, with per-violation penalties of $53,088

At the state level, New York, California, and Texas have added disclosure requirements that go beyond federal standards. New York's synthetic-performer disclosure law took effect June 9, 2026; California's SB 942 and Tennessee's ELVIS Act add voice-cloning and provenance rules .

The FTC now treats undisclosed AI-generated content as a form of material misrepresentation when consumers would reasonably expect the content to be human-created .

The Industry Push Back Toward Human Creators

Even as brands quietly experiment with synthetic influencers, the broader market is moving in the opposite direction:

• Creator content ad spend hit $44 billion in 2026 as brands shifted from one-off posts toward long-term, performance-driven partnerships with real human creators .
• Consumer trust is eroding for AI-generated content. A Digiday report noted that after "oversaturation of AI-generated content," brands are increasingly seeking authenticity and "messiness" from human creators, with some explicitly requesting imperfections in partnership deals .
• Brand partnerships with AI influencers are declining. Transaction data from Collabstr showed brand partnerships with AI social accounts dropped by about 30% in the first eight months of 2025 compared to the same period in 2024, amid growing consumer backlash .
• Academic research warns of brand risk. A Northeastern University 2025 study found that AI influencer marketing poses risks to brand trust, reinforcing the commercial incentive for brands to stick with humans .

The pattern is clear: while some brands pursue the cost savings of AI-generated influencers under non-disclosure agreements, the regulatory ground is shifting beneath them, and the market's trust premium is flowing back toward human authenticity.