If you have proof the last month was paid and further proof that it was never transferred to you at closing, you should have a good case.

Be sure to ask for proof of the other offer to protect your buyer when using that type of clause though.

Have you been able to confirm this with proof of payment or lease agreements?  

I also send a Text Message.The mere act of sending the Notice to vacate by  Certified Mail - Return Receipt Requested is Legal Proof of Notification in Texas.

Plus they want your proof of funds.

Buying in Texas is like shooting yourself TWICE with 1 bullet. 

I'm hoping these properties to fall in a C class neighborhood...looking to avoid bullet holes and "war zones".  

The laws do pretty much put ALL the burden of proof and ALL the risk on landlords around this.  

Ask for references for anyone you consider partnering with - they should have plenty and be willing to put you in touch.Once you've narrowed down your markets/teams to your top one or two choices, bite the bullet and fly out to see the area, shake hands, look people in the eye, see some of their work with your own eyes.

At the time I thought I might be potentially making the financial mistake of my life and I did not know anyone local to validate what I was doing.While the cash flow was nice and I had proof of concept I found that a duplex required more management attention than I could handle with an international job and gone most of the time.