It will boil down to your moral compass.

That should be your compass.

This evil bastard has a faulty moral compass and has decided to steal from the "rich" (you) and give to the "poor" (himself) by squatting on the premises under the guise of a non-existent or forged lease.Where I in your position, I'd find a FLAT RATE eviction attorney that has experience with these kinds of cases as soon as humanly possible.

I know this is a business, but have a little compassion.... this is a once in a lifetime (hopefully) tragedy.....epic destruction and chaos...people's lives destroyed....everything they own lost.

@Jay Sechowicz this is where compassion kicks in.

How can I invest and can't even read a compass.

Maybe this is not possible as the business cannot be compromised with compassion but could there be both?  

@Matt due to their hardship and compassion on my side they have legitimate reason when they paid me installment last 2 months but they do eventually pay the whole thing .

As far as compassion goes...what is the legal precedent for a special compassion tax to be levied on landlords?

Since she is a cosigner, I think you should keep her in the loop with any notices.Do have compassion though.