I think you'll find the '812' is used for BUYER-initiated transactions and the '820' for SELLER-initiated transactions, each with appropriate debit/credit code values.
MCM . Please use the following Message Identifiers as your subject prefix: <SALES>, <JOBS>, <LIST>, <TECH>, <MISC>, <EVENT>, <OFF-TOPIC> Access the list online at: http://groups.yahoo.com/group/EDI-L Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/EDI-L/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
