diff --git a/addons/sale/models/sale_order.py b/addons/sale/models/sale_order.py
index e059a62e44112..bd11ccd299ae0 100644
--- a/addons/sale/models/sale_order.py
+++ b/addons/sale/models/sale_order.py
@@ -1149,12 +1149,6 @@ def action_confirm(self):
                 raise UserError(error_msg)
 
         self.order_line._validate_analytic_distribution()
-
-        for order in self:
-            if order.partner_id in order.message_partner_ids:
-                continue
-            order.message_subscribe([order.partner_id.id])
-
         self.write(self._prepare_confirmation_values())
 
         # Context key 'default_name' is sometimes propagated up to here.