diff --git a/odex25_sales/dev_membership/models/res_config_settings.py b/odex25_sales/dev_membership/models/res_config_settings.py
index 0f548b8f1..027381133 100644
--- a/odex25_sales/dev_membership/models/res_config_settings.py
+++ b/odex25_sales/dev_membership/models/res_config_settings.py
@@ -59,3 +59,24 @@ class CancellReason(models.Model):
     _description = 'Cancellation Reason'
 
     name = fields.Char(string='Reasone of Cancellation')
+    reasone_no = fields.Char("Number", default=lambda self: self._get_next_reasone_no(), tracking=True,copy=False)
+
+    @api.model
+    def _get_next_reasone_no(self):
+        next_sequence = "/ "
+        sequence = self.env['ir.sequence'].search(
+            ['|', ('company_id', '=', self.env.company[0].id), ('company_id', '=', False),
+             ('code', '=', 'seq.product.template')], limit=1)
+        if sequence:
+            next_sequence = sequence.get_next_char(sequence.number_next_actual)
+        return next_sequence
+
+    @api.model
+    def create(self, vals):
+        company_id = vals.get('company_id', self.default_get(['company_id'])['company_id'])
+        self_comp = self.with_company(company_id)
+        if not vals.get('reasone_no', False):
+            vals['reasone_no'] = self_comp.env['ir.sequence'].next_by_code('seq.cancellation.reason') or '/'
+        return super().create(vals)
+
+