To identify the invoice or purchase order that is being disputed or adjusted.
Invoice Issue Date.
Identifying number assigned by issuer.
Date assigned by the purchaser to Purchase Order.
Identifying number for Purchase Order assigned by the orderer/purchaser.
Number assigned by a vendor referencing a particular customer purchase order.
Code qualifying the Reference Number.
Reference number or identification number as defined for a particular Transaction Set, or as specified by the Reference Number Qualifier.
