36 Deferred

Mandate ‘Know Your Customer’ checks and platform data disclosure for digital advertising supply chain transparency.

Recommendation
The internet, and social media, could not operate without digital advertising. Given its implications for public safety, as per Principle 5, there needs to be heightened transparency in the market processes of online advertising. Government should mandate ‘Know Your Customer’ checks for participants in the programmatic advertising supply chain, as exists in other large markets. The government should also ensure that platforms disclose full ad campaign data, and allow independent third-party audits and vetting of ad exchange supply partners. (Recommendation, Paragraph 100)
Government Response Summary
The government acknowledges concerns regarding trust and transparency in online advertising and commits to exploring options for 'Know Your Customer' checks, alongside other interventions, through its continued work with the Online Advertising Taskforce. However, it does not commit to mandating these checks or to ensuring platforms disclose full ad campaign data and allow independent third-party audits, as recommended.
Government Response
Deferred
HM Government Deferred
Digital Advertising is a core component supporting growth of the Advertising sector, as outlined in the Government’s Creative Industries Sector Plan published on 23 June 2025. While we acknowledge that there are concerns around trust and transparency in the Online Advertising ecosystem, it is important that any measures taken to address those concerns are carefully considered and do not unduly undermine the value that advertising brings to the wider Creative Industries and many other businesses across the economy. We will explore options for ‘Know Your Customer’ checks alongside other possible interventions, including our continued work with the Online Advertising Taskforce, to address any harms linked to digital advertising.
Addressee Bodies
Department for Science, Innovation and Technology
Timeline
Recommendation age 0.9 yr
Report published 11 Jul 2025