For E-Verify, a mismatch on a SS number can occur when:
The employee has not updated his or her citizenship or immigration status with SSA
The employee did not report a name change to SSA
The employee’s name, Social Security number or date of birth is incorrect in SSA records
SSA records contain another type of mismatch
The employer entered the employee’s information incorrectly in E-Verify
I believe there can also be a mismatch if the employee is a victim of identity theft.
So it makes sense to give the employee time to resolve the issue with SSA.
https://www.e-verify.gov/employers/verification-process/tentative-nonconfirmations-mismatches
Isn't SSA going to be broke in another five years? Or is it just SS that will be broke, but the administration, like all bureaucratic frankensteins, will continue to suck taxpayer money far beyond its purpose or rationale for existing?