All debit notes with invoice reference are processed by the automatic payment program together with the original item, that is, one payment is created for both the item and the related credit memo. If the bank layout requires an entry in the rebate field (for Banco Itaú, for example), the credit note amount enters into the corresponding bank file as rebate belonging to the original item and reducing its amount. If there is more than one credit note pointing to one item, the rebate of this item is the sum of all those credit notes.