Geocaching HQ Admin: Mob caches were published as an experiment using specific technology that required players to be at the same place and to enter a code at the same time to learn the final coordinates. This was an exception to the guidelines at the time, and is not a publishable concept today.
The original site used for this purpose has been removed, and therefore, HQ has decided to archive all active caches originally intended to be solved using this method. Due to privacy laws, we are not seeking an alternative site at this time. We are respectfully requesting that the cache owner please remove the cache container and contents as soon as possible.