D.C. Mun. Regs. r. 50-5043
Contractors shall create and submit payment requests in an electronic format through the DC Vendor Portal, https://vendorportal.dc.gov .
Contractor payment requests shall include or attach any information necessary to demonstrate entitlement to the requested payment under the contract's terms.
Depending on the contract's payment provisions, a payment request may consist of, for example, a statement that specified work has been completed in a satisfactory manner, documentation showing that contract deliverables have been accepted by OAG, or information detailing the reimbursable costs incurred by the contractor.
Payment shall not be made unless authorized by OAG.. A payment authorization shall not preclude OAG from seeking repayment (or pursuing other remedies) if it subsequently concludes that the contractor was overpaid, paid in error, or otherwise misled OAG.
In addition to the payment authorization, all payment requests must be certified and approved by the District's Chief Financial Officer (or his or her designee) prior to making any payment.
No OAG employee shall authorize payment for the value of supplies and services received without a valid written contract or for supplies or services that have not been verified to be received or satisfactorily delivered. Any vendor who enters into an oral agreement with an OAG employee to provide supplies or services to OAG without a valid written contract shall not be paid unless approved by the CCO. This subsection shall not apply to a payment required by court order, or a final decision of the District of Columbia Contract Appeals Board.
D.C. Mun. Regs. r. 50-5043