Thank you again, new to the site and this is very helpful. 

If this approach doesn't work, then I'll consider hiring a special process server to serve it.  

My brokerage syndicates it to all the sites but zumper gets the most hits.

Hello, I just joined this site, however I've been in this business for three decades....not sure that is a good thing. :) We are very competitive our products. 780 score ,25% down DSCR rates 6.875%, 30/30 Interest Only, $5027 IO, if 5 year prepay, No points.

Maybe she was someone else's dependent for a year (while you were serving time for tax fraud).

Well if you have a contract they are not living up to, then you need to serve them.

In fact I have a clause in my leases that if I find out anyone is doing so it will immediately terminate their right to remain in the lease and they will be served notice. 

Sites like AirDNA, STRInsights, Mashvisor, and others can show the supply of STRs for sale in a market vs. previous years to see if there are changes year over year.

I’m a residential superintendent in NYC which requires me to live on-site so, from my understating I don’t think I will qualify for a FHA loan on a multi-family because that requires me to live in one unit for a year.

Withold rent, get served an eviction notice.