It is not used in a  confrontational way these days but I hadn't thought about that difference. 

It is Beverly Hills (aka Beverly Hillbillies) Was not expecting this type of problem.....I have a steel spine and am not afraid to confront anyone, my significant other is from another culture and she has a speed bump effect on my natural approach, hence I am here searching for best practices.

Mostly, I despise confrontation and will go out of my way to avoid it.  

See my profile on this website.You chose to assume a confrontational posture.

Do you just confront the tenant and say "is there another person not on the lease living here?"

If by chance this happens, it is best to not confront the beast but to keep your distance until the courts can set it free!

The refrigerator is a favorite spot of some breeds.They will crawl through this powder and bring it back to the colony, if any.I would confront the issue honestly and directly with the tenant in a non-confrontational way.

Should I confront the daughter when she is there?

Instead of confronting their fears, they allow their fears to hold them back.Fear of failure, fear of losing money, fear of embarrassment, fear of starting over, fear of rejection etc.A lack of knowledge regarding real estate will intensify these fears, making it more difficult to manage.Often enough, many people take advice from people who failed in real estate or who have never had a successful career in real estate.

Surely she could just tell Bro to move on...or is she secretly not wanting to have confrontation with family.