Background checks

We did ChoicePoint checks at one of my previous employers.
It gave us a multistate criminal background check, address and employment history (as reported to the credit bureaus), multistate driving history and a simple credit report.
The credit report was ONLY for the applicant, a spouse has their own SSN and it is illegal to pull a credit report without consent. My company didn't pay any attention to the credit report portion unless the person was applying for a financial position.

I can tell you that using ChoicePoint in four years I had 2 nurses come up with recent out of state addresses and employers who they didn't mention on their application. A call to the BoN in those states revealed recent license revocations.