External reference types recorded here are used in interfacing to an external financial system.

In the Callista Open Finance Interface, required reference types are supplied using installation scripts provided with the system. The current system-supplied external reference types are:

• RECEIPT - a record of this type holds the receipt number of a payment record in Callista.
• INVOICE_AR - a record of this type holds the invoice number of a debit memo associated with a refund in Oracle Receivables. Although, for institutions using the Invoice Summary method of interface, a refund debit memo is not actually created, the refund reference of type INVOICE_AR is still created.
• INVOICE_AP - a record of this type holds the invoice number of payment of a refund through Oracle Payables.
• TAX_TRN_ID - for taxable fees, a record of this type holds a reference which links a payment transaction to the transaction reflecting the tax paid on that payment transaction. This is required for inclusion of tax payment amounts in the payment details extracted for Statements of Account and Sponsor Summary Statements.

The following external reference fields are available and can be used in the SAP area if required:

• INV_SORT
• PAYMT_TYPE
• PAY_SORT