USCIS has announced that its E-Verify System will now incorporate a security feature where a social security number (SSN) can be “locked” if it appears to have been misused. In order to safeguard against fraud, USCIS advises that it will use a “combination of algorithms, detection reports and analysis” to identify patterns of fraudulent SSN use and will lock the number in the E-Verify system. If an employee attempts to use a locked SSN, E-Verify will generate a “Tentative Nonconfirmation” (TNC). The employee will then have the opportunity to contest the TNC finding with a local Social Security Administration (SSA) field office. If the SSA confirms the employee’s identity correctly matches the SSN, the TNC will be converted to “Employment Authorized” status in E-Verify. While an employee contests a TNC an E-Verify employer is prohibited from taking any action adverse to their employment status. While this enhancement will go a long way to resolving some of the deficiencies in the E-Verify system and provide some safeguards from identity theft, it may also trigger unintended consequences. Locking the SSN will also impact the true holder of the number. In some cases it may be difficult to determine the true owner of the SSN and while the SSA sorts out the discrepancy, the number will remain locked in the system.