408.918—What notices will you receive if you are overpaid or underpaid?
        
        (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.