Originally posted by DrLoveMonkey
If you could ask them who owns it an they can give you an accurate answer, the charm fails.
I'd go so far as to say that it doesn't have to be an accurate answer, just a specific answer. If I sincerely believe that Ragara Landowner owns my farm, then the Charm fails even if Nellens Capitalist bought my farm from Landowner last week.
On the other hand, if I set up an ambush at a random farmhouse and offer Mnemon Assassinationtarget hospitality (so I can assassinate him), he has no idea who actually owns the farm and so I can use the Charm to claim ownership.