The landlord did a credit, criminal and eviction check on the business owners.

Now its getting criminal, read this; https://www.biggerpockets.com/...

You run the criminal background check to confirm if a applicant is a sex offender.Bottom line is you still have the ability to reject any applicant you choose for personal reasons even if it is their appearance, attitude smell etc.

It is criminal to to raise money incorrectly.

They also won't be sent to jail as this is not criminal.

In Ohio, we have 2 courts in each local that handle most of the criminal and civil activity.  

Unless you did something dumb, like label the box "Apt 206", no criminal is going to steal the keys and try every door in the complex.

At a minimum, they should be checking their credit and criminal history.  

Is there a website where they can go and pay for a background check both criminally and financially and the report would be sent to me.

since its been revived, no you do not have to accept sec 8 in virginia, but since this original post 5 yrs ago many states and city have made it mandatory to accept as a form of income, and 3x rent as income has been tested and failed in some of those states, they have stated it is a form of discrimination against type of income, criminal background check does still stand, but only if convicted