The Department of Homeland Security (DHS) has formally withdrawn its Social Security "no-match" regulation, promulgated back in 2007. The no-match regulation set forth a "safe harbor" for employers who receive letters from the Social Security Administration (SSA) stating that an employee's Social Security Number (SSN) does not match the agency's records. The safe harbor rule required employers to take certain steps to resolve the discrepancy within a certain period of time or face liability. Shortly after being issued in 2007, the no-match regulation was challenged in court, subject to an injunction and ultimately never implemented. As of October 7, 2009, the rule was formally rescinded.