You're correct that most of the time you won't be able to file for back rent for the time period where you didn't have the licenses but you can still obtain them now and use them to file for possession. 

I evicted a tenant holdover from a property I foreclosed on and in the process he revealed to me that the tenant who preceded him had possessions in the apartments storage unit.I have no idea who this person is and suspect I have been placed in the position of an involuntary bailee of that property. 

Information about Justice Court CasesAn Eviction Case is a lawsuit brought to recover possession of real property, usually by a landlord against a tenant.

Since I still have dealings with the PM until I can get possession of the keys, I will Private message you instead of making it public info.  

You also want to have a smart strategy for getting possession of a house if you purchase one that is occupied.  

He has not taken possession of the property, so I don't really know what process to follow to reclaim the apartment and re-rent it.  

That, you possess the skills and determination needed to find the borrower and solve the issues of delinquency or default.

They have something valuable (possession under a valid lease agreement.)

Or if they want to start the lease on a 1st but take possession on the 25 of the month before. 5 days rent free usually makes a new tenant pretty happy.

It is sold "as is" and also states that "buyer is responsible for obtaining possession of property upon closing."