I used Zillow to list my rental and accepted someone's application however after my few interactions with them on the phone some major red flags have come up and I wanted to know am I under any legal obligation to rent my property to this person. 

I’ve noticed a few areas of concern (or red flags) during my research that I’d like to verify after digging through forums.

Blue, Green, Yellow, Orange, and Red are A, B, C, D, and F, respectively. 

I would definitely have a red flag raised for future dealings with this tenant if they didn't own up to it. 

The only part that is a red circle is the male's background check shows  criminal records in 2019.

Al 2 bed 2 bath units with updated open kitchens and modern baths, some with deep tubs!

Usually a steepening yield curve following a deep inversion is the most classic indicator of the start of the fall.

I've got a deep discount on a truly passive STR.I've got a lead on a deal that can be purchased almost $100k under list price given the circumstances.

Unfortunately, there are several barriers, including finding a seller willing to accept this loan, a lot of lender red tape, and then coordinating a qualified/licensed contractor to do all the work.

Consider the downside (what if you take them to court and end up with nothing) before you jump in the deep end.I hope this situation resolves itself for you and doesn't put you off of investing in real estate.