20 C.F.R. § 404.511 : Employees' Benefits — SOCIAL SECURITY ADMINISTRATION — FEDERAL OLD-AGE, SURVIVORS AND DISABILITY INSURANCE (1950- ) — OVERPAYMENTS, UNDERPAYMENTS, WAIVER OF ADJUSTMENT OR RECOVERY OF OVERPAYMENTS, AND LIABILITY OF A CERTIFYING OFFICER — When an individual is at ''fault'' in a deduction overpayment