Another way to own a non-Turnkey property , is to consider a Partner that lives in the subject area and is willing to help you physically. 

Most of the time, people just mail to physical addresses.

How do I get the physical address from this? 

You'll never get the money but at least you get rid of him.This is why it's important to inspect every unit before purchase (including physical inspection, payment history, lease terms, etc.) and why you should have a reserve.

The previous owner still has all their stuff in there but they are not physically living there.

If you have an LLC then all forms are in your name if you aren't incorporated then all forms are in your name.

@Daniel Dietz , If this deal is done via LLC, you need either article of incorporation that is detailed enough and plus an operating agreement. 

It is a good idea to:Spur them into action to redeem; and/orLegally gain official possession of the property in case there might ever be some dispute about whether you were physically in exclusive and continuous possession.

In other words, a digital copy of a physical original is generally enforceable, but not 100% bulletproof.That said, I’d suggest holding onto the physical originals that you already have. 

I successfully eliminated all types of crawling pests larger than an ant from a duplex we own by physically sealing all holes that I found with caulk or even that nasty yellow gap filler stuff for larger areas.