As of April 4, 2022, the Federal Government has transitioned from using the DUNS number to a Unique Entity Identifier (UEI) created in SAM.gov. Current SAM.gov registrants have already been assigned their Unique Entity Identifier (SAM) and can view it within SAM.gov. GPO will use this number to confirm exclusion status. GPO requests all vendors previously registered in Contractor Connection, to enter this number in your registration. For more information, visit https://sam.gov/content/home.