Voiding Invoice #
In case where an invoice has been voided (ie a new voiding invoice having negating amounts was created), this field will present the invoice number of the voiding (ie negating / reversing) invoice.
Note that the voiding invoice number is the same as the original invoice number with a "-REV" suffix added. Voiding and Voided invoices will sort together on listings.
See Invoice Voiding / Reversal for additional information.