(I know, but it happens)Analyze their credit report and if you feel comfortable, do a background check and make sure their criminal history checks out.Another key factor is employment history.

The area they live in has a good share of folks with criminal backgrounds. 

They claimed they couldn't get folks that met my standards (non smokers, no pets, stable job history, no criminal background, and sufficient income).

Criminal history may not contain drug offenses within 7 years except for one conviction for possession of a controlled substance.

I have scared off a bunch of dead beat tenants already by simply telling them my requirements and that I DO screen their credit and criminal history and I DO check their references.

There was nothing bad on the background, eviction or criminal check.

This was my first time in marketing, showing the property, and running their credit/criminal background.

I call it credit card hacking though thats probably not a great name for it with cyber crime and all.

Either call her on violation of lease(if she is violating it), or he submits an application that you thoroughly vet-credit, criminal checks.

We also use the Colorado Bureau of Investigation which can do a quick online criminal history for about $7.