Consular Lookout and Support System

The Consular Lookout and Support System (CLASS) is a system supporting the U.S. Department of State Bureau of Consular Affairs: it assists in decisions for visa and passport issuance and helps establish a person's eligibility for overseas services. It is used by U.S. Department of State passport agencies and consular posts as well as U.S. Department of Homeland Security and other border inspection agencies to perform namechecks on visa and passport applicants to identify individuals who may be ineligible for issuance or require other special action.

Source: Wikipedia — Consular Lookout and Support System (CC BY-SA 4.0)