The article is really unclear, but to me it sounds like they were doing reverse phone lookups. Illegal advertising - get the details of the number on the poste

The article is really unclear, but to me it sounds like they were doing reverse phone lookups. Illegal advertising - get the details of the number on the poster. Unregistered pets - maybe they have an 'if found please call ...' tag on the pet, but no pet registration. People dumping stuff illegally - if you were dumping general household/office waste, you'd probably have letters or bills with your address on it already, but I can think of scenarios where they might only have your email address to go on.