You must notify the RRB immediately if you go to work in the railroad industry. Do not wait for your employer to notify the RRB.
If you are the employee annuitant, your regular annuity, or any supplemental annuity cannot be paid for any month in which you work for a railroad employer. This law applies no matter how old you are or how much money you earn from that work.
If you are the spouse annuitant, your annuity is not payable for any month you work for a railroad or for any month the employee annuitant returns to railroad work.