Unlike all other types of payment/credit transactions, Write Offs must be applied and posted before they will appear on an Invoice. Check to make sure the Write Off has been applied and posted. If it is applied and posted, check the date of the Write Off against the Invoice Date you are using. Unless your Invoice Style is set to include fully applied and posted transactions after the Invoice Date, the Write Off must be dated on or before the Invoice Date before it will be shown on the invoice.