Does anyone have a surrender agreement they could share? 

A deed in lieu is a deed in lieu of foreclosure and is executed between you and your lender.A deed in lieu is where you surrender the property to the lender and they wipe the mortgage and note.

She still had to make her monthly payments until I found a tenant and she surrendered her keys.

If we are in the process of bringing the building up to code, but still have aspects that are outdated, will this surrender our ability to house Section 8 tenants? 

You have 60 calendar days after lease termination and surrender of possession to provide a written accounting of security deposit deductions and/or a refund of the security deposit. 

I had come to the premature decision to offer the tenant an early termination fee of three (3) months rent plus the surrender of his security deposit. 

We are not fighting inflation...we are surrendering to it. 

So my question is what exactly happens to a rental property house that was surrendered in Ch 13 BK.

Your business is to know when she has surrendered possession so you can come in and clean up the mess she leaves behind.  

If Tenant fully performs each and every obligation as provided in this lease and pays all sums due to Landlord, then Landlord, after the Tenant has surrendered possession of the premises and has delivered the keys thereto, shall refund said deposit to Tenant."