A debt secured by property that is worth less than the amount of the debt.

An officer of the Justice Department responsible for supervising the administration of bankruptcy cases, estates, and trustees, monitoring plans and disclosure statements, monitoring creditors' committees, monitoring fee application, and performing other statutory duties.

A claim for which a specific value has not been determined.

A debt that should have been listed by a debtor in the schedules filed with the court but was not.

A claim or debt for which a creditor holds no special assurance or payment, such as a mortgage or lien; a debt for which credit was extended based solely upon the creditor's assessment of the debtor's future ability to pay.