CFR›Title 45›Subtitle B›Chapter VI›Part 681›Subject Group Procedures Leading to Issuance of a Complaint ContainsSections 681.4–681.8CorpusDaily eCFRDisplayed edition2026-10-01Last updated2026-10-01 Sections 681.4 § 681.4 Who investigates program fraud? 681.5 § 681.5 What happens if program fraud is suspected? 681.6 § 681.6 When may NSF issue a complaint? 681.7 § 681.7 What is contained in a complaint? 681.8 § 681.8 How will the complaint be served? Previous Procedures Following Service of a Complaint Procedures Following Service of a Complaint Next Purpose, Definitions, and Basis for Liability Purpose, Definitions, and Basis for Liability