I have configured SAP to generate an IDoc from the payment run that will automatically send the payment file to our bank in order to execute wires and ACH payments. Some vendors require further instructions on their wires. An example is that a company has all of their wires sent to one central account and then we have to put instructions of the wire as to what sub account it needs to go to. I don't see anywhere in SAP where I can enter those instructions and then have them included on the payment information that I am sending to the bank. Do you know of a way to do this?
Check whether Instruction key defined in transaction code OB47 will be helpful. The path is as under:
SPRO > Financial Accounting > Accounts Receivable > Business Transactions > Outgoing Payments > Automatic Outgoing Payments > Payment Media > Data Medium Exchange > Define Instruction keys.