An agency may request that money payable from the Fund be offset to recover any valid debt due the United States when all of the following conditions are met:
(a)
The debtor failed to pay all of the debt on demand, or the creditor agency has collected as much as possible from payments due the debtor from the paying agency; and
(1)
Obtaining a court judgment for the amount of the debt;
(4)
Following the procedures agreed upon by the creditor agency and OPM, if it is excepted by § 845.405(b)(4) from the completion of procedures prescribed by § 845.405(b)(3).