This field is related to the SWICUSBVR - Swiss ISR usage Sales (LOC chapter, SWI group) parameter.
The payment bank information is used to print the necessary sender’s bank account information on ISR payment forms. Use this bank account as the destination account when paying the invoice.
The ISR payment bank for the invoice is determined by the Payment bank ISR field in one of the following functions. The system pulls the information from the first entry found: