Mentorship is crucial for structuring the Letter of Intent (LOI), due diligence, and financial analysis.

You can probably have a friend do it, and have him sign a letter attesting.

I would even venture to guess that it is not a simple letter to the lender or trade that gets a lien release.   

The carrier may issue a "reservation of rights" letter and ultimately deny indemnification; but generally they have a duty to defend.   

I would structure the lease as a corporate lease to the company, if the company wants the lease in the occupants (employees) name make sure to get a letter of responsibility from the company stating that they're financially responsible for the rental agreement. 

Or should I talk to him and ask for additional security deposit since we received the bankruptcy letter?

I cannot communicate with the tenant (except maybe via letter).

My CPA and another CPA I contacted said they do not provide those types of letters. 

I recently switched insurance carriers for two of my rental properties and about two months after coverage started, I received a letter for each property with a list of items to be remediated within 40 days or coverage would be revoked.

I requested the owner/seller provide a written letter that there were no leases in places, the agent assured me that wouldn't be a problem and I should recieve documents in a couple of hours.