diff --git a/addons/event_sale/event_sale.py b/addons/event_sale/event_sale.py
index 15e528dbaff..c561375dcf6 100644
--- a/addons/event_sale/event_sale.py
+++ b/addons/event_sale/event_sale.py
@@ -86,9 +86,9 @@ class sale_order_line(osv.osv):
                     'event_id': order_line.event_id.id,
                 }
                 message = _("The registration has been <b>created</b> for event <i>%s</i> from the Sale Order %s. ") % (order_line.event_id.name, order_line.order_id.name)
-                context.update({'sale_event': True, 'message': message })
+                context.update({'mail_create_nolog': True, 'sale_event': True, 'message': message })
                 registration_id = registration_obj.create(cr, uid, dic, context=context)
-                registration_obj.create_send_note(cr, uid, registration_id, context=context)
+                registration_obj.message_post(cr, uid, registration_id, body=message, context=context)
         return super(sale_order_line, self).button_confirm(cr, uid, ids, context=context)
 
 sale_order_line()
@@ -96,14 +96,8 @@ sale_order_line()
 class event_registration(osv.osv):
     _inherit = 'event.registration'
 
-    # ----------------------------------------
-    # OpenChatter methods and notifications
-    # ----------------------------------------
-
-    def create_send_note(self, cr, uid, ids, context=None):
-        if context.get("sale_event") and context.get("message"):
-            message = context.get("message")
-            self.message_post(cr, uid, ids, body=message, context=context)
-        else:
-            super(event_registration, self).create_send_note(cr, uid, ids, context=context)
-        return True
+    def message_post(self, cr, uid, thread_id, body='', subject=None, type='notification', subtype=None, parent_id=False, attachments=None, context=None, content_subtype='html', **kwargs):
+            """ Overrides mail_thread message_post so that we can set the message note when
+                a new registration create on the event sale.
+            """
+            return super(event_registration, self).message_post(cr, uid, thread_id, body=body, subject=subject, type=type, subtype=subtype, parent_id=parent_id, attachments=attachments, context=context, content_subtype=content_subtype, **kwargs)