Here we would like to draw your attention to OVF4 transaction code in SAP. As we know it is being used in the SAP SD-BIL (Billing in SD) component which is coming under SD module (Sales & Distribution).OVF4 is a transaction code used for C SD Matchcodes Billing Documents in SAP.
It comes under the package VF0C.
Transaction OVF4 technical data table
|Purpose||C SD Matchcodes Billing Documents|