The invoice form for sent invoices has a field called New Due Date. This allows for extending the payment period when agreed upon with the invoice recipient. However, if a new due date is added to the invoice, it will not be displayed on the invoice image (nor when the invoice is resent). Nevertheless, the new due date will be taken into account in the sales ledger listings, for example, the invoice will not appear in overdue invoices even if the original due date has passed, as long as the new due date given to the invoice is still in the future.