NOTE: The InterSwitch application will have a web front end where the external system scheme operator can configure her float card that will be used for the above transaction

• External system maintains a list of all organization it plans to support. This can be obtained by a mix of the following calls: GetBillers, GetBillerPaymentItems, GetBillerCategories
• External system debits user’s account or accepts mode of payment
• External system sends a SendBillPaymentAdvice message to InterSwitch containing all relevant information to complete the bill payment
  InterSwitch credits organization and performs settlement against external system’s sponsor bank.
• In the case of any error, InterSwitch will respond appropriately and this would go all the way to the external system to do reversals internally
• External system can always use a QueryTransaction call to InterSwitch to verify any transaction status