An ANSI X12 EDI 820, also known as Payment Order or Order Remittance Advice is an EDI message or document is used in the exchange of transactional information between trading partners. It is based on the Accredited Standards Committee (ASC) X12 format and defined by the American National Standards Institute (ANSI) which is a governing body controlling EDI formats in the U.S. It is issued by a buyer at the end of an EDI workflow after receiving an EDI 850 document. It informs about the amount of compensation to be transferred for the delivered goods or services. It is like sending a supplier a notice of intent to pay an invoice and is generated through a specialized application. This advice of remittance can either be transferred directly from payer to payee or by a financial institution or third-party agent.