1 min readEarly Payment and Billing Frequency on Long-Term ContractsOIG CommunicationsSep 28, 1998 Article September 28, 1998 Download Report Early Payment and Billing Frequency on Long-Term Contracts (IG-98-033) PDF (408.23 KB) Share Details Last Updated Sep 28, 2026 Related TermsAudit ReportsFY1998