The Invoice Payment Transactions Transfer option is activated after selecting the factoring definition in the Factoring Code. It is located in the right click menu of the Factoring Record and the transactions menu. 

The Payment/Collection Transactions list opens when you click the Invoice Payment Transactions Transfer option. The Payment/Collection Transactions list displays only the sales invoices in Approved status; Retail Sales Invoices, Purchase Return Invoices, Wholesale Sales Invoices, Service Sales Invoices, Asset Sales Invoices, Sales Price Differences, Due Date Diff.Invoice (Issued), and the collection transactions belonging to the AR/AP where "Assignable" checkbox is selected.
The date entered in the Factoring Record Date field must be earlier than the payment date of the payment and collection transaction. The Payment and Collection transactions of which date is older than the date of the factoring record are not displayed on this screen.
The payment/collection transaction to be assigned is selected and transferred to the Invoice Information field on the Factoring Record screen by the Select button.