Department of Defense Financial Management Regulation (DoD FMR) Volume 10, titled “Contract Payment Policy,” establishes the comprehensive framework and internal controls governing the entitlement, certification, and disbursement of vendor and contract payments. The volume mandates rigorous standards for prevalidation—the process of matching a planned disbursement with a recorded obligation before payment—and strict adherence to the Prompt Payment Act, ensuring that payments are made timely to avoid interest penalties while taking advantage of economically justified discount offers and rebates. It prescribes the required supporting documentation for commercial payment vouchers, including proper invoices and receiving reports, heavily emphasizing the use of electronic submission systems like Wide Area Workflow (WAWF). Furthermore, Volume 10 provides extensive guidance on a wide array of specialized financial scenarios, including miscellaneous advance payments, intra-governmental transactions, contract financing, commercial transportation, and reimbursements for personal expenditures. The regulation also dictates strict compliance procedures for handling Federal, state, local, and foreign taxes and their associated IRS reporting. Finally, it ensures ongoing financial integrity and accountability through detailed policies on contract reconciliation, the execution of payment recovery audits to identify and recapture overpayments, and the rigorous management and oversight of Government Purchase Card (GPC) programs and convenience checks