any amount received from the United States which is attributable to underpayments of benefits due for one or more prior months, under this subchapter or subchapter II, to such individual (or spouse) or to any other person whose income is deemed to be included in such individual’s (or spouse’s) income for purposes of this subchapter; but the application of this paragraph in the case of any such individual (and eligible spouse if any), with respect to any amount so received from the United States, shall be limited to the first 9 months following the month in which such amount is received, and written notice of this limitation shall be given to the recipient concurrently with the payment of such amount;