20 C.F.R. § 416.550
Waiver of adjustment or recovery of an overpayment of SSI benefits may be granted when (EXCEPTION: This section does not apply to a sponsor of an alien):
(b) Adjustment or recovery of such overpayment would either:
[52 FR 8882, Mar. 20, 1987, as amended at 53 FR 16543, May 10, 1988]