Write the tenant a warning.

If it's not in writing it never happened!

The feedback I usually get is that buyers wanted to assume the loan but the process was lengthy and complicated, and buyers eventually moved on leaving the seller with no equity and option to sell other than writing a fat check at the closing table since they had to continue to lower their price.

When you write a post, in the bottom right (above the cancel and post reply buttons) is a box that when checked says notify me when a reply is posted...uncheck that box.

It's possible the deceased father agreed to let her manage the property and keep the rent net for her troubles, but the title/ownership remains in him so his heirs would inherit it as a legacy.I suggest your friend familiarize himself with the statute of frauds which I believe requires agreements regarding real estate be in writing to be enforceable.

I have all my criteria set up, I'm just not too sure what to write in the description.  

I would write a professional response and move on.

If your real estate acquisition sale is insured, you would either wire funds to escrow with closing instructions or write a cash line check. 

You do need to tell your homeowners insurance that you are a landlord and are leasing out the other half of the property so they can write the appropriate liability coverages for you. 

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!