Earlier quoted context omitted.
> Without knowing what was collected how can they prove it was deleted? They don't need to know what data was collected. GDPR requires you to track all data and mark where you got it from, so the companies are legally required to track this for you, they should already have a switch where they can delete this data at the notice of the user, so they should have no problems honouring such a request from the government.…
What you're saying is literally illogical in the case of IAB acting as an intermediary... Not sure you know what you're talking about in this case. The entire point of the original article is that the user's data is being fed through via IAB to tracking companies. This isn't a normal GDPR situation where the user's data directly is being stored in a way that's accessible to the user as well. Obviously in that scenari…
> how will the Council know if the end-tracking companies deleted their data?
That doesn't matter, all they need is to ask the companies and the companies to say that they deleted the data. That is how everything else works with GDPR. When you ask a company to delete your data you don't know the company deleted it, they could still store it but keep it hidden etc. The government asking this is exactly the same.
If it later comes up that companies has a lot of data about users that they can't explain how they got, or that traces back to this case where they said they deleted it, then those companies will get huge fines. Open violations of laws where there is no question that the company knew they were breaking it are a very different case from companies toeing the line, the fines would get much higher.