If you are referring to the Genie medical software, "verifying" data is a maintenance process used to ensure database health:

This article dissects the anatomy of the Carding Genie ecosystem, the verification process that gives it legitimacy in the underworld, and the defensive strategies required to combat it.

If you're interested in learning about how credit card information is verified for legitimate purposes, such as fraud prevention in the banking and e-commerce sectors, I'd be happy to provide information on that.