diff --git a/ext/custom-addons/dp_custom/models/sale.py b/ext/custom-addons/dp_custom/models/sale.py
index 85d0c226..dcdf64cf 100644
--- a/ext/custom-addons/dp_custom/models/sale.py
+++ b/ext/custom-addons/dp_custom/models/sale.py
@@ -18,6 +18,7 @@
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ##############################################################################
+import re
 from datetime import datetime
 
 from odoo import api, fields, models, _
@@ -297,6 +298,14 @@ class SaleOrder(models.Model):
                                            subtype_id=self.env.ref('mail.mt_note').id)
         return [inv.id for inv in invoices.values()]
 
+    @api.multi
+    def action_confirm(self):
+        # change name on order confirmation
+        if self.state == 'draft' and self.name.startswith('ATOF'):
+            new_name = re.sub(r"^ATOF", "ATOC", self.name)
+            self.name = new_name
+        return super(SaleOrder, self).action_confirm()
+
 
 class SaleOrderLine(models.Model):
     _inherit = 'sale.order.line'
diff --git a/setup/lib/config_glaser.py b/setup/lib/config_glaser.py
index 20ccb476..7a24606f 100644
--- a/setup/lib/config_glaser.py
+++ b/setup/lib/config_glaser.py
@@ -35,7 +35,7 @@ class ConfigGlaser(Config):
         self.sequences = {
             'sale.order': {
                 # 'number_next_actual': 1,
-                'prefix': 'ATOC%(range_y)s-',
+                'prefix': 'ATOF%(range_y)s-',
                 'padding': 6,
                 'use_date_range': True,
                 'monthly_date_range': False
diff --git a/setup/lib/config_tza.py b/setup/lib/config_tza.py
index 76765ba6..2abaed7b 100644
--- a/setup/lib/config_tza.py
+++ b/setup/lib/config_tza.py
@@ -36,7 +36,7 @@ class ConfigTZA(Config):
         self.sequences = {
             'sale.order': {
                 # 'number_next_actual': 1,
-                'prefix': 'ATOC%(range_y)s-',
+                'prefix': 'ATOF%(range_y)s-',
                 'padding': 6,
                 'use_date_range': True,
                 'monthly_date_range': False