I'd simply have language that clearly explains the tenants are on the hook and if payment is missed you'll be treating it like any other eviction proceeding. 

I would contact them ahead of time and explain the situation so that they aren't scared by the change.

I checked the instructions for Form 4797 or Form 1040 Schedule D, and neither explain how to indicate that the gain is deferred and not taxable right now.So either: 1) Form 4797 is irrelevant to my exchange and I don't need to file it at all, or 2) I am missing something. 

I've explained the situation to them and will repeat all the info on VRBO once it's back up.

I didn't end up buying it but called the buyer's agent who sold it and explained it to him so his buyers would think he was a savant!

. :-) and @Michael Plaks: knows his stuff, for the "normal" real estate investorLet me explain.

Their team also did not explain processes, waits too long to review and communicate items back to their customers. 

You seem to have done a great job explaining the value without going into those weeds though.

Include a short, clear note explaining that payments are still being sent to the prior owner despite submission months ago.

Force interpretation, not descriptionAdd this line:“Do not just summarize — explain what each metric implies about efficiency, risk, and management quality.”3.