I don't have a fool proof answer for you. 

For a fool proof system, you should have a camera in the NVR room, and the NVR should upload motion-sensed recordings to location off site.If you've never used a video surveillance system before, keep in mind that most low-end systems have cameras with built in LEDs (some that you can't turn off) for night time recording.

It is usually fairly small, but I have a property which was severely damaged ($100k+ in repairs) because the homeowner ignore the foundation.You could put in some kind of automatic watering system, but nothing is foolproof, especially if the person living in the property decides they want to shut it off since it would go on their water bill.

It's not a foolproof system, the I do a pretty good job of figuring out if they have one on the tax assessor's site.  

They certainly aren't foolproof and can be distorted, but they aren't meaningless.

It will mask the true ownership of the home, not a foolproof strategy but may discourage a lawsuit and/or make it harder/more expensive for someone to pursue.

There is no foolproof system for sure, but I haven't heard of anyone having this problem.

I know that's how most people lose their homes in HOA battles, so it would be our absolute last resort - even if our case seems foolproof.

While it is not foolproof, it certainly is a way for you to open up the conversation with the potential tenant about your role and expectation for compensation, as well as a way by which to recover funds if the tenant were to go around you.

A great fool proof check is to just give them a call and have a conversation, you can learn a lot from that as well!