diff --git a/models/dp_delivery_carrier.py b/models/dp_delivery_carrier.py
index 82e02ec..e55d54a 100644
--- a/models/dp_delivery_carrier.py
+++ b/models/dp_delivery_carrier.py
@@ -152,6 +152,8 @@ class DPDeliveryCarrier(models.Model):
             else:
                 raise Warning('Product %s has no Country of Origin defined' % (ptempl.name))
             weight = ptempl.weight
+        if not ptempl.customs_code:
+            raise Warning('Product %s has no Customs Code defined' % (templ.name))
         hts = ptmpl.customs_code.replace(' ', '')
         desc = ptmpl.customs_description_en
         if line.procurement_id and line.procurement_id.sale_line_id: