I recommend you consult with one of us in private, as these family situations are tricky to resolve.
As for the notice rules, you can do two things at once. Give son a 3-day pay or quit notice, and a 30 day notice ending the monthly agreement. If son has rented for over a year, you must give 60 days notice. I would get help meeting with son, and give him the notices during the meeting. You can also mail the notice. Use certified mail, but do not use the return receipt feature.
If son doesn’t pay the rent, you can start an eviction. However evicting someone you live with isn’t pleasant, which is why you should get help negotiating a solution with son. Paying him to leave will be easier and cheaper than legal process.
These situations rarely occur without substance abuse or illness being in play, which is another reason to get help dealing with it.
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