45 CFR 30.17 - Collection in installments.
(a) Whenever feasible, the total amount of a debt shall be collected in one lump sum payment. If a debtor is financially unable to pay a debt in one lump sum, either by funds or administrative offset, the Secretary may accept payment in regular installments. The Secretary will obtain financial statements from debtors who represent that they are unable to pay in one lump sum and independently verify such representations as described in § 30.22(a)(1).
(1) When the Secretary agrees to accept payments in regular installments, a legally enforceable written agreement should be obtained from the debtor that specifies all the terms and conditions of the agreement, and that includes a provision accelerating the debt in the event of a default.
(2) The size and frequency of the payments should reasonably relate to the size of the debt and the debtor's ability to pay. Whenever feasible, the installment agreement will provide for full payment of the debt, including interest and charges, in three years or less.
(3) In appropriate cases, the agreement should include a provision identifying security obtained from the debtor for the deferred payments.