Disbursement to a contractor based on the contractor's certification that delivery has been made at the time an invoice is presented for payment.
A payment method that allows payment to be made without evidence that supplies have been received. Instead, a contractor certification that supplies have been shipped may be used as the basis for authorizing payment. Payment may be made within 15 days after the date of receipt of the invoice.
Fast Pay has been defined 2 different ways in documents like DoD Financial Management Regulation Glossary, GLOSSARY of ADS TERMS.