diff --git a/addons/website_sale/controllers/main.py b/addons/website_sale/controllers/main.py
index 7f8415f1608..073d368c0f3 100644
--- a/addons/website_sale/controllers/main.py
+++ b/addons/website_sale/controllers/main.py
@@ -842,6 +842,10 @@ class WebsiteSale(http.Controller):
                 values = kw
             else:
                 partner_id = self._checkout_form_save(mode, post, kw)
+                # We need to validate _checkout_form_save return, because when partner_id not in shippings
+                # it returns Forbidden() instead the partner_id
+                if isinstance(partner_id, Forbidden):
+                    return partner_id
                 if mode[1] == 'billing':
                     order.partner_id = partner_id
                     # This is the *only* thing that the front end user will see/edit anyway when choosing billing address