Anyone can "ask for validation" of a contract or judgement. A private contract like one has with a home contractor or any federal agency - that debt will need to be paid. The federal and
state governments are considered sovereign and therefore debts to sovereigns do
not go away – they can only be forgiven or invalidated. Debts that cannot be discharged
include child support, spousal support obligations, restitution judgments, most unpaid taxes, and judgements with an injured fact-witness (i.e. a valid tort).