diff --git a/addons/stock_dropshipping/stock_dropshipping.py b/addons/stock_dropshipping/stock_dropshipping.py
index 0d29448dd5f..a41760820e3 100644
--- a/addons/stock_dropshipping/stock_dropshipping.py
+++ b/addons/stock_dropshipping/stock_dropshipping.py
@@ -26,11 +26,20 @@ class sale_order_line(models.Model):
 class purchase_order(models.Model):
     _inherit = 'purchase.order'
 
+    @api.one
+    def _check_invoice_policy(self):
+        if self.invoice_method == 'picking' and self.location_id.usage == 'customer':
+            for proc in self.order_line.mapped('procurement_ids'):
+                if proc.sale_line_id.order_id.order_policy == 'picking':
+                    raise Warning(_('In the case of a dropship route, it is not possible to have an invoicing control set on "Based on incoming shipments" and a sale order with an invoice creation on "On Delivery Order"'))
+
     @api.multi
     def wkf_confirm_order(self):
-        for po in self:
-            if po.invoice_method == 'picking' and po.location_id.usage == 'customer':
-                for proc in po.order_line.mapped('procurement_ids'):
-                    if proc.sale_line_id.order_id.order_policy == 'picking':
-                        raise Warning(_('In the case of a dropship route, it is not possible to have an invoicing control set on "Based on incoming shipments" and a sale order with an invoice creation on "On Delivery Order"'))
+        """ Raise a warning to forbid to have both purchase and sale invoices
+        policies at delivery in dropshipping. As it is not implemented.
+
+        This check can be disabled setting 'no_invoice_policy_check' in context
+        """
+        if not self.env.context.get('no_invoice_policy_check'):
+            self._check_invoice_policy()
         super(purchase_order, self).wkf_confirm_order()