20 CFR § 255.3 - When overpayments are to be recovered.

Overpayments shall be recovered in all cases except those in which recovery is waived under § 255.10 of this part or administrative relief from recovery is granted under § 255.16 of this part, or where the overpayment is compromised or recovery is terminated or suspended under § 255.18 or § 255.19 of this part.