if ($_SESSION['Items']->count_items() == 0 && (!check_num('ChargeFreightCost',0)))
return false;
if($_SESSION['Items']->trans_no == 0) {
- if (!$Refs->is_valid($_POST['ref'])) {
+ if (!$Refs->is_valid($_POST['ref'], ST_CUSTCREDIT)) {
display_error( _("You must enter a reference."));
set_focus('ref');
$input_error = 1;