(a) Notice of overpayment or underpayment determination. Whenever we determine that you were overpaid or underpaid for a given period, as defined in §408.903, we will send you a written notice of the correct and incorrect amounts you received for each month in the period, even if part or all of the underpayment must be withheld in accordance with §408.905. The notice of overpayment will advise you about recovery of the overpayment, as explained in §§408.920-408.923, and your rights to appeal the determination and to request waiver of recovery of the overpayment under the provisions of §408.910.

(b) Notice of waiver determination. Written notice of an initial determination regarding waiver of recovery will be mailed to you in accordance with §408.1005 unless you were not given notice of the overpayment in accordance with paragraph (a) of this section.