This invoice Portal is for the submission of invoices to OOCEP, supporting a prompt payment system. Please note that once your invoice is submitted, it enters our system in an electronic queue whereby invoices will be processed in chronological order of receipt. Invoices that fulfill the administrative instruction on the OOCEP purchase order/contract/service order shall be automatically processed. Please help us in prompt payment by assuring the OOCEP administrative instructions are followed, including presentation of purchase order/contract/service order numbers. Failure to provide this information may delay payment.