The NRC may terminate collection activity when:
The NRC is unable to collect any substantial amount through its own efforts or through the efforts of others;
The NRC is unable to locate the debtor;
Costs of collection are anticipated to exceed the amount recoverable,
The debt is legally without merit or enforcement of the debt is barred by any applicable statute of limitations;
The debt cannot be substantiated; or
The debt against the debtor has been discharged in bankruptcy.