@Anthony HunterI can tell you that my local code enforcement love playing detective with bandit signs to find the owner and give them a fine per sign.Strangely their heavy handed enforcement has worked and you know when you leave the city limit by seeing bandit signs again.

You wrote the seller obtained a writ of possession and I believe possession is a far cry from a final judgment quieting the title in the seller's name. 

Personal letters, a fine-tuned inspection response, and holding our cards close.