+=item replace_check
+
+Additional checks for replace only.
+
+=cut
+
+sub replace_check {
+ my ($new,$old) = @_;
+ #preserve old value if global config is set
+ if ($old && $conf->exists('invoice-ship_address')) {
+ $new->invoice_ship_address($old->invoice_ship_address);
+ }
+ return '';
+}
+