Sometimes, it will be a non-existent address; I have found these can be data entry errors (closely resembles another legitimate address), or can be fictional addresses from a credit application in the past.

If not then what’s the point of converting a room(s) into a JADU, other than legitimizing a rental unit?

If you are not familiar with the real estate contracts of your state, it would probably be worth it to pay for an attorney to review your contract and see if you have any legitimate outs.

The zillow listing had a lot of details and very good pictures, so the people who called from the yard sign I referred to the pictures on zillow before showing.Surprisingly, every single person who contacted me seemed to be a legitimate potential tenant in the market to rent, more than half of whom scheduled showings (I could have paired this number down by screening over the phone, since this was my first time listing a rental I figured I might as well show as much as possible, if nothing else just to gain the experience, get feedback on the property etc.) and every person who scheduled a showing showed up and showed up on time.  

Nothing can be considered legitimate as far as tenants are concerned and it always comes back to harm the landlord.

If you turn over a s#@t unit to a Tenant expect to see a lot of requests both for legitimate issues and petty ones (because a tenant will feel like you've bamboozled them) likewise if you ignore important and legitimate requests like a non-functional toilet expect to now receive a lot of requests for every little petty thins.

Even though I firmly believe this is all vastly overblown especially compared against past flu variations in the last two decades, it is hard to ignore the human element and the fact that some people are legitimately scared right now.

In these unchartered waters, tenant has a legitimate point not to want people in her house.

(And if there are any legitimate repairs that need to be made it'll give you time to make them before they actually move in.)Good luck with these tenants.

Thanks for the tips, I'll definitely have loads of questions lined up for the future interviews I have with legitimate prospective prop. management companies.