I think you are mixing up I-9 with E-Verify. The I-9 form, you just need to show the employer either your SS Card and DL or some other form of ID. None of this information is reported anywhere except on the form that the employer keeps on record. The employer is not required to turn in that information to the government. Now if the employer also runs the person through the E-Verify system, then they can run a report to see if they have employee's whose status has changed.
We are not required to use E-Verify so when we hire someone, I have the new employee fill out the I-9 form and show me the required ID, then I file the form with the employee's employment file. The only notification that I've ever received is when we had a project that required us to use E-Verify and it had issues with one employee, but I got that notice when trying to submit the information the first time. Which the employee got fixed and the only other E-Verify notices I receive is to change my password.
Psy