I do not police who is a tenant-The borrower-sighs essentially a affidavit that says they occupy the property at least X- % percentage of the time , if a post closing review shows they are not at that property and live somewhere else they broke a Federal Law and the lender "in theory can- call their loan due. In the real world we all know people play games BUT the risk for the appraiser is to say the occupant is a tenant , and the borrower comes back and say no that's my Uncle-Cousin--Son-daughter who let the appraiser into the house while I was on business. This is very big in the areas where there are large immigrant populations.
I often do reports where the owners-buyers-sellers all have the same last names. In one Asian community there is one specific last name that is like 20% of the community. I decided after my nephew handled a lawsuit where an-appraiser claimed the occupant was a tenant and the borrowers loan was declined. The borrower sued him and he was awarded damages, saying the appraiser had targeted him because of his race and that his last name was very common. The tenant had told the appraiser She rented it but in her deposition , She said she did not understand and in her Country that did not mean you paid rent. Anyway the poor appraiser was hammered , declared a racist blah, blah, blah. My nephew the attorney said what ever you do -never be the occupancy police- If the lender says it's owner occupied that's there problem and they can deal with it if something goes south down the road.