If this is the case it is CRIMINAL!!!!

There are actually several appellate decisions holding that if a contract is assigned you have to pay two sets of transfer taxes - one as if the property was sold to the wholesaler and another from the wholesaler to the end buyer - even if it only involves a single closing.Also, PA has been following suit with several other states in bringing criminal prosecutions against wholesalers for acting as an unlicensed real estate broker.The work around to this is to sign an option, not a sales agreement, with the seller.

Mark,No offense, and i hope you have continued good fortune with your rental properties, but I see you sell memphis properties and work for one of the larger "turnkey" outfits.

What is their criminal / misdemeanor  background?  

Combine that with the rest of the picture: employment verification, rental references, criminal/background check (look for active judgements from creditors).

It's an entirely different mindset that accounts for both offense and defense.  

Please DO NOT write about ANY Legal Matter where you think you can suffer a criminal penalty (fine, misdemeanor, felony, infraction, etc).

is there a good one stop shop that can run credit, criminal, and rental history? 

There are also sites like SpotCrime and other free site to check criminal activity.

TransUnion provides a credit, criminal and rental history.