If you read the OP, the druggie uncle has lived in the house for five years, not just a few days or weeks. So, forcing him to leave could require Grandma to seek a formal eviction IF the druggie uncle is smart enough to force her down that path. That is why I suggested the OP learn the legal process to get it done.In your particular case most likely your friend (or ex-friend) wasn't present long enough to be classified a resident, but you do have to be careful about being kind in the future. You wouldn't be the first person where "a few nights on the couch" stretched out to a few weeks, then a month, then the mail starts arriving and the driving license gets changed, and you have a real problem on your hands.