Basically treat it like a line discount or invoice discount and show the discounted amount on the invoices?
My colleague says we must either add the Payment Discount as a Line Discount and if the customer pays too late then invoice it separately, or alternatively, every time a customer paid with Payment Discount send a credit note.
I have checked the localised database and it does not automatically deduct the payment discount from invoices, so what is the best way to handle it?