Tier 1
The Federal Data Services Hub. The Hub accesses the Social Security Administration (SSA) database in real-time to verify citizenship and identity status.
The Electronic Access to Social Security (EATSS) database. If the Hub is not available, EATSS may be accessed to verify citizenship and identity status for those individuals who are current or former recipients of SSI, Medicare, or Social Security disability benefits ( 2145.2 ). EATSS may not be used to verify citizenship or identity of individuals who do not meet that criterion.