I'm shopping for vendors that can assist us in verifying the identification of our customers. What vendors are out there?

Lexis Nexis AML solution is probably the best out there. A little pricey but I think they have different pricing models for different usage.

We have used it for verifications of addresses, SSN, names, relatives, etc. We also had success using it for record checks on lending. There was a function to check state and federal civil and criminal records to see if they were ever in any fraud cases. Kinda neat...

...and if you were talking about verifying driver's licenses I think they may have some states but I am not 100% sure. I know for a fact that California isn't published but so use a service from the DMV to validate.