diff --git a/easy_my_coop/models/account_invoice.py b/easy_my_coop/models/account_invoice.py
index b485a91..acb64e6 100644
--- a/easy_my_coop/models/account_invoice.py
+++ b/easy_my_coop/models/account_invoice.py
@@ -26,19 +26,19 @@ class account_invoice(models.Model):
         # flag the partner as a effective member
         obj_sequence = self.env['ir.sequence']
 
-        mail_template_name = 'Payment Received Confirmation - Send By Email'
+        mail_template_id = 'easy_my_coop.email_template_certificat'
 
         # if not yet cooperator we generate a cooperator number
         if self.partner_id.member is False and self.partner_id.old_member is False:
-            sequence_id = obj_sequence.search([('name', '=', 'Subscription Register')])[0]
+            sequence_id = self.env.ref('easy_my_coop.sequence_subscription', False)
             sub_reg_num = sequence_id.next_by_id()
             self.partner_id.write({'member': True, 'old_member': False,
                                    'cooperator_register_number': int(sub_reg_num)})
         elif self.partner_id.old_member:
             self.partner_id.write({'member': True, 'old_member': False})
         else:
-            mail_template_name = 'Share Increase - Payment Received Confirmation - Send By Email'
-        sequence_operation = obj_sequence.search([('name', '=', 'Register Operation')])[0]
+            mail_template_id = 'easy_my_coop.email_template_certificat_increase'
+        sequence_operation = self.env.ref('easy_my_coop.sequence_register_operation', False)
         sub_reg_operation = sequence_operation.next_by_id()
 
         for line in self.invoice_line_ids:
@@ -58,7 +58,8 @@ class account_invoice(models.Model):
                                            'effective_date': effective_date})
 
         email_template_obj = self.env['mail.template']
-        certificat_email_template = email_template_obj.search([('name', '=', mail_template_name)])[0]
+        certificat_email_template = self.env.ref(mail_template_id, False)
+        #certificat_email_template = email_template_obj.search([('name', '=', mail_template_name)])[0]
         # we send the email with the certificat in attachment
         certificat_email_template.send_mail(self.partner_id.id, False)
 
diff --git a/easy_my_coop/models/coop.py b/easy_my_coop/models/coop.py
index 4b8c7a6..d84a99d 100644
--- a/easy_my_coop/models/coop.py
+++ b/easy_my_coop/models/coop.py
@@ -48,7 +48,7 @@ class subscription_request(models.Model):
                     vals['already_cooperator'] = True
         subscr_request = super(subscription_request, self).create(vals)
         mail_template_obj = self.env['mail.template']
-        confirmation_mail_template = mail_template_obj.search([('name', '=', 'Confirmation Email')])[0]
+        certificat_email_template = self.env.ref('easy_my_coop.email_template_confirmation', False)
         confirmation_mail_template.send_mail(subscr_request.id)
         return subscr_request
     
@@ -62,7 +62,7 @@ class subscription_request(models.Model):
                 vals['already_cooperator'] = True
         subscr_request = super(subscription_request, self).create(vals)
         mail_template_obj = self.env['mail.template']
-        confirmation_mail_template = mail_template_obj.search([('name', '=', 'Company Confirmation Email')])[0]
+        certificat_email_template = self.env.ref('easy_my_coop.email_template_confirmation_company', False)
         confirmation_mail_template.send_mail(subscr_request.id, True)
         return subscr_request
     
diff --git a/easy_my_coop/models/operation_request.py b/easy_my_coop/models/operation_request.py
index ecfbe05..93dbec1 100644
--- a/easy_my_coop/models/operation_request.py
+++ b/easy_my_coop/models/operation_request.py
@@ -149,6 +149,7 @@ class operation_request(models.Model):
         effective_date = self.get_date_now()
         ir_sequence = self.env['ir.sequence']
         sub_request = self.env['subscription.request']
+        email_template_obj = self.env['mail.template']
 
         for rec in self:
             rec.validate()
@@ -173,7 +174,7 @@ class operation_request(models.Model):
                 if rec.receiver_not_member:
                     partner = rec.subscription_request.create_coop_partner()
                     #get cooperator number
-                    sequence_id = ir_sequence.search([('name','=','Subscription Register')])[0]
+                    sequence_id = self.env.ref('easy_my_coop.sequence_subscription', False)
                     sub_reg_num = sequence_id.next_by_id()
                     partner_vals = sub_request.get_eater_vals(partner, rec.share_product_id)
                     partner_vals['member'] = True
@@ -197,7 +198,8 @@ class operation_request(models.Model):
             else:
                 raise ValidationError(_("This operation is not yet implemented."))
             
-            sequence_operation = ir_sequence.search([('name','=','Register Operation')])[0]
+            #sequence_operation = ir_sequence.search([('name','=','Register Operation')])[0]
+            sequence_operation = self.env.ref('easy_my_coop.sequence_register_operation', False)
             sub_reg_operation = sequence_operation.next_by_id()
             
             values = {'name':sub_reg_operation,'register_number_operation':int(sub_reg_operation),
@@ -208,14 +210,13 @@ class operation_request(models.Model):
             
             rec.write({'state':'done'})
             
-            email_template_obj = self.env['mail.template']
             if rec.operation_type == 'transfer':
                 values['partner_id_to'] = rec.partner_id_to.id
-                certificat_email_template = email_template_obj.search([('name', '=', "Share transfer - Send By Email")])[0]
+                certificat_email_template = self.env.ref('easy_my_coop.email_template_share_transfer', False)
                 certificat_email_template.send_mail(rec.partner_id_to.id, False)
     
             self.env['subscription.register'].create(values)
             
-            certificat_email_template = email_template_obj.search([('name', '=', "Share update - Send By Email")])[0]
+            certificat_email_template = self.env.ref('easy_my_coop.email_template_share_update', False)
             certificat_email_template.send_mail(rec.partner_id.id, False)
      
\ No newline at end of file