If nothing else, it would show the tenant you are taking their concerns seriously.I would also do a search on the property history;   it's very possible the tenants did this as well, and uncovered something disturbing about the house that is the root of this.  

A poorly-structured deal with an improper debt structure, not enough reserves raised and adverse market conditions derail the cash, uncontrollable bad debt that sacrifices cash flow with no ability by the sponsor to bridge the gap, uninsured total earthquake loss (or similar uncovered loss), nuclear war, just to name a few.  

I understand it varies by county but I assume I can just contact the county via phone, email, or online portal.Do you know of examples of what an official title search could uncover that I'm likely to miss?