To help make sure, I want to require buyer to either add the tenant balances to purchase price (which will not happen) or sign an agreement waiving his right to those balances and acknowledging that unpaid balances will still be owed to previous owner/manager. 

Also acknowledging the necessity for the customer to have personal skin in the game, that may not be 10% down but needs to be significant enough to them that they do not back away and we are caught with nothing.

In FL for example, not only must the owner sign an affidavit acknowledging who and where they can collect the money from by themselves, the fee by law is set at a max 12% for the firm assisting.

Our team is experienced in handling eviction notices with the utmost care and promptness, ensuring legal compliance at every step.We acknowledge the urgency of your situation and are committed to beginning the process without unnecessary delays as soon as we receive your documents and payment.

-A lock-box will be discretely affixed to the property to permit access upon proper notification to seller.Possession: At closingWe have read the entire contents of this agreement and acknowledge receipt of same.

So they sign title but not the note however they acknowledge the mortgage.

With their signature, the tenant acknowledges they have received the information on this form and also the EPA pamphlet "A Brief Guide to Mold, Moisture, and Your Home".This helps protect us in the case of future litigation, so we keep this document in permanent archive, even years after a tenant has moved out.

Acknowledge the past and clarify what you need for the future.

It would be nice if the OP @Anita Ahuja would take the time to respond, or at least acknowledge that...

But next time, perhaps acknowledge the change of subect?