The erid (token) itself is embedded in the link leading to the indonesia mobile number list advertiser’s site. It will look like this: Example of advertising marking Example of advertising marking In reality, the banner had a menu, but for the sake of example, the marking was done manually, as it may look in practice. A readable plate is applied over the banner, and the erid is embedded in the advertiser's link.
In this case, Roskomnadzor's position is that the marking should be noticeable and readable not only for a person, but also for a parser robot, which monitors the presence of marking on resources. If the robot cannot read all the marking data, then technically there is marking, but a fine will still come, since Roskomnadzor will not receive the full amount of marking data.
And in the end, you will have to provide evidence through the court that the advertisement was placed within the framework of the law, but Roskomnadzor was unable to record this. Therefore, be careful if marking is applied in this way, you will save your nerves, money and time, avoiding unnecessary courts. There is another example, which is also often encountered in practice in VKontakte, Yandex, it looks like this: Example of marking via VK advertising account Example of marking via VK advertising account In case you place via Yandex or Vkontakte advertising account.