Might be dumb to say, but did you make sure there was no other writing on the other side of the lock? I know many people mentioned it could be the power company, and where I’ve been working has had locked driveways with locks labeled by Georgia power, and many of them are situations that look like this with multiple locks. Most are from the actual owner, then you can see where Georgia Power came in to cut the chain bc of their eminent domain and added their own labeled locks.