diff --git a/sale_tier_validation/README.rst b/sale_tier_validation/README.rst
index 10857e8b486..07a0b5604f3 100644
--- a/sale_tier_validation/README.rst
+++ b/sale_tier_validation/README.rst
@@ -79,6 +79,8 @@ Known issues / Roadmap
 -  The sales order, when moved to the state sent, will still send the
    email even if the validation is not approved by the corresponding
    tier. Code to consider this particular case is not developed.
+-  If any module modifies the attrs of the confirm sales order button,
+   it will invalidate the expected behavior.
 
 Bug Tracker
 ===========
diff --git a/sale_tier_validation/readme/ROADMAP.md b/sale_tier_validation/readme/ROADMAP.md
index e01cc6a8b09..98aba5706df 100644
--- a/sale_tier_validation/readme/ROADMAP.md
+++ b/sale_tier_validation/readme/ROADMAP.md
@@ -1,3 +1,5 @@
 - The sales order, when moved to the state sent, will still send the
   email even if the validation is not approved by the corresponding
   tier. Code to consider this particular case is not developed.
+- If any module modifies the attrs of the confirm sales order button,
+  it will invalidate the expected behavior.
\ No newline at end of file
diff --git a/sale_tier_validation/static/description/index.html b/sale_tier_validation/static/description/index.html
index aeea843889a..b23afebd049 100644
--- a/sale_tier_validation/static/description/index.html
+++ b/sale_tier_validation/static/description/index.html
@@ -429,6 +429,8 @@ <h1><a class="toc-backref" href="#toc-entry-4">Known issues / Roadmap</a></h1>
 <li>The sales order, when moved to the state sent, will still send the
 email even if the validation is not approved by the corresponding
 tier. Code to consider this particular case is not developed.</li>
+<li>If any module modifies the attrs of the confirm sales order button,
+it will invalidate the expected behavior.</li>
 </ul>
 </div>
 <div class="section" id="bug-tracker">
diff --git a/sale_tier_validation/views/sale_order_view.xml b/sale_tier_validation/views/sale_order_view.xml
index 54e192d47fe..f9ce5e81042 100644
--- a/sale_tier_validation/views/sale_order_view.xml
+++ b/sale_tier_validation/views/sale_order_view.xml
@@ -2,6 +2,25 @@
 <!-- Copyright 2019 Open Source Integrators
      License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl). -->
 <odoo>
+    <record id="view_order_form" model="ir.ui.view">
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_form" />
+        <field name="arch" type="xml">
+            <xpath expr="//button[@name='action_confirm'][1]" position="attributes">
+                <attribute
+                    name="attrs"
+                >{'invisible':['|', ('validation_status', 'in', ('pending', 'rejected')),('state', '!=', 'sent')]}</attribute>
+            </xpath>
+            <xpath expr="//button[@name='action_confirm'][2]" position="attributes">
+                <attribute
+                    name="attrs"
+                >{'invisible':['|', ('validation_status', 'in', ('pending', 'rejected')),('state', '!=', 'draft')]}</attribute>
+            </xpath>
+             <field name="state" position="after">
+                <field name="validation_status" invisible="1" />
+            </field>
+        </field>
+    </record>
     <record id="view_sale_order_filter" model="ir.ui.view">
         <field name="name">sale.order.select - sale_tier_validation</field>
         <field name="model">sale.order</field>