diff --git a/app_common/models/__init__.py b/app_common/models/__init__.py
index b9af2dec..534ba2b7 100644
--- a/app_common/models/__init__.py
+++ b/app_common/models/__init__.py
@@ -30,6 +30,7 @@ from . import ir_mail_server
 from . import mail_mail
 from . import ir_http
 from . import app_import
+from . import res_partner
 
 
 
diff --git a/app_common/models/res_partner.py b/app_common/models/res_partner.py
new file mode 100644
index 00000000..e0a087bc
--- /dev/null
+++ b/app_common/models/res_partner.py
@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, fields, models, tools,  _
+
+
+class ResPartner(models.Model):
+    _inherit = 'res.partner'
+
+    def get_related_user_id(self):
+        self.ensure_one()
+        user = self.env['res.users'].sudo().with_context(active_test=False).search([('partner_id', '=', self.id)], limit=1)
+        return user