"When the need to succeed is as bad as the need to breathe, then you'll be successful"Author- Eric Thomas

I suggest getting an authorization to release and a specific limited power of attorney from the seller/borrower.  

I was, however, very worried about the local Housing Authority policies regarding implementation of the HAP (Housing Assistance Payment) Contract.

It may take a while to get through the NACA process.In Mass, there is also Mass Housing Finance Authority:  https://www.masshousing.com/portal/server.pt/community/home_buyers/225/loans_for_home_buyersMass Housing have income caps that vary by geography within the state. 

So now, it was time to renew the lease --- but since I'm not a Realtor, it looks like I'm not authorized to use the same lease.OK, so first, I went to Nolo.com, and searched residential lease forms, and found a form for Texas.

Has anyone successfully turned a scammer into the police or other authority?  

After a written report, a hearing from the parties, full Board members may authorize legal action.Also on the first notice:"Your tenants were advised on [day / time] that they were permitted to move into the building Monday through Friday, between 9:00AM and 5:00AM, no weekends and no holidays."

in certain states, you are required to have their authorization. 

The servicers will not talk with you until you have a signed authorization from the owners.  

The "Collection Company" may not have authority to sell the loan in any manner only to collect.