(if (gncInvoiceIsPosted invoice)

        (begin
          (gnc:html-table-append-row!
           invoice-details-table
           (make-date-row (_ "Date") (gncInvoiceGetDatePosted invoice) date-format))

          (if (opt-val "Display" "Due Date")
              (gnc:html-table-append-row!
               invoice-details-table
               (make-date-row (_ "Due Date") (gncInvoiceGetDateDue invoice) date-format))))


       (gnc:html-table-append-row!
               invoice-details-table
               (make-date-row (_ "Estimate Date:") (gncEntryGetDate (car (reverse (gncInvoiceGetEntries invoice)))) date-format))

        (gnc:html-table-append-row!
               invoice-details-table
               (make-date-row (_ "Valid Till:") (incdate (gncEntryGetDate (car (reverse (gncInvoiceGetEntries invoice)))) ThirtyDayDelta) date-format))