The scammer is not buying advertising for my sites, they are trying to sell advertising on my sites, without my knowledge or permission. This is happening repeatedly, which is the reason why I am looking for a permanent solution.
Have asked the networks , but they say that this information is private. For the ad network, it does not matter who the publisher / webmaster is,they will earn the same money. However, the domain registrant who pays the web hosting fees and other website expenses, should be correctly identified by the ad network as he/she/they are the owners of the website, entitled to advertising revenue.
Do you have any experience in getting a subpoena? If yes, please share.