I would contact an attorney to get the ball rolling and see what's next

Quote from @Charles Evans: You are actually behind the 8-ball on this.

If someone isn’t willing to provide ID, they are not a serious applicant and possibly a scammer, so it’s a good screening tool to weed out the tire-kickers and sketch balls.

Swimming pool filled with wooden marbles, and here I come and I throw 3 steel marbles inside the pool and mix it up real good.Then I will tell you this: "Your mission is to find me the 3 steel balls".Now this is what you all are doing.You plant your butt next to the pool with your legs in the wooden marbles, you pick one bacll, inspect it, is it a steel ball?

I do see how the knowledge could likely save me the equivalent in mistakes but none of us have a crystal ball.

That might cause you unnecessary stress and lead to dropped balls for your clients. 

Quote from @Josh Ball: Quote from @Jonathan Greene: Smokers aren't a protected class, but they could argue that whatever the underlying "medical" issue for the card could be part of one.

Section 8 can be a profitable and reliable resource but it is 'their ball, their court' so know the rules first.

You should sit down with the tenant and talk this out, EYE BALL TO EYE BALL.  

If my crystal ball is correct, we are going to see a lot of these sub2 deals hit the fan in the next 36 months.