A Quick Look at the Core Difference The administrative stage for document collection and biometrics is called VAC (Visa Application Center). Embassy/Consulate: A consular officer will decide whether to grant or deny your visa. Organized and Prepared: Navigating the U.S. Visa Interview with Comprehensive Documentation for a Successful Visa Application Process. VAC Appointment (Document Collection & Biometrics) 1. What Takes Place at VAC? This is not an interview; visa decision