31 CFR § 900.2 - Definitions and construction.
(a) For the purposes of the standards in this chapter, the terms “claim” and “debt” are synonymous and interchangeable. They refer to an amount of money, funds, or property that has been determined by an agency official to be due the United States from any person, organization, or entity, except another Federal agency. For the purposes of administrative offset under 31 U.S.C. 3716, the terms “claim” and “debt” include an amount of money, funds, or property owed by a person to a State (including past-due support being enforced by a State), the District of Columbia, American Samoa, Guam, the United States Virgin Islands, the Commonwealth of the Northern Mariana Islands, or the Commonwealth of Puerto Rico.
(b) A debt is “delinquent” if it has not been paid by the date specified in the agency's initial written demand for payment or applicable agreement or instrument (including a post-delinquency payment agreement), unless other satisfactory payment arrangements have been made.
(c) In parts 900–904 of this chapter, words in the plural form shall include the singular and vice versa, and words signifying the masculine gender shall include the feminine and vice versa. The terms “includes” and “including” do not exclude matters not listed but do include matters that are in the same general class.
(d) Recoupment is a special method for adjusting debts arising under the same transaction or occurrence. For example, obligations arising under the same contract generally are subject to recoupment.
(e) For purposes of the standards in this chapter, unless otherwise stated, “Secretary” means the Secretary of the Treasury or the Secretary's delegate.