diff --git a/sale_order_client_order_ref_mandatory/README.rst b/sale_order_client_order_ref_mandatory/README.rst
new file mode 100644
index 00000000000..9b90a6ab4ba
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/README.rst
@@ -0,0 +1,114 @@
+=====================================
+Sale Order Client Order Ref Mandatory
+=====================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:7958cbf2a8aa393f6b649de571594b362d2043e10285117f485b8cfa5a33e49f
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fsale--workflow-lightgray.png?logo=github
+    :target: https://github.com/OCA/sale-workflow/tree/18.0/sale_order_client_order_ref_mandatory
+    :alt: OCA/sale-workflow
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/sale-workflow-18-0/sale-workflow-18-0-sale_order_client_order_ref_mandatory
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
+    :target: https://runboat.odoo-community.org/builds?repo=OCA/sale-workflow&target_branch=18.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+For a Sale Order, makes required client_order_ref field and reposition
+it, for both form view and Sale reports. Also makes this field
+searchable and add an optional column on both quotation and sale orders
+lists
+
+Sale Order Form View
+--------------------
+
+Before
+~~~~~~
+
+|sale_order_before|
+
+After
+~~~~~
+
+|sale_order_after|
+
+Sale Report
+-----------
+
+Before
+~~~~~~
+
+|template_before|
+
+After
+~~~~~
+
+|template_after|
+
+.. |sale_order_before| image:: https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_before_image.png
+.. |sale_order_after| image:: https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_after_image.png
+.. |template_before| image:: https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_template_before_image.png
+.. |template_after| image:: https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_template_after_image.png
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/sale-workflow/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/sale-workflow/issues/new?body=module:%20sale_order_client_order_ref_mandatory%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+-------
+
+* Solvos
+
+Contributors
+------------
+
+- `Solvos <https://www.solvos.es>`__
+
+  - Christian Santamaría <christian.santamaria@solvos.es>
+  - David Alonso <david.alonso@solvos.es>
+  - Dante Pereyra <dante.pereyra@solvos.es>
+
+Maintainers
+-----------
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+This module is part of the `OCA/sale-workflow <https://github.com/OCA/sale-workflow/tree/18.0/sale_order_client_order_ref_mandatory>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.
diff --git a/sale_order_client_order_ref_mandatory/__init__.py b/sale_order_client_order_ref_mandatory/__init__.py
new file mode 100644
index 00000000000..0650744f6bc
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/sale_order_client_order_ref_mandatory/__manifest__.py b/sale_order_client_order_ref_mandatory/__manifest__.py
new file mode 100644
index 00000000000..9e8c96fe6ff
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/__manifest__.py
@@ -0,0 +1,19 @@
+# © 2025 Solvos Consultoría Informática (<http://www.solvos.es>)
+# License AGPL-3 - See http://www.gnu.org/licenses/agpl-3.0.html
+{
+    "name": "Sale Order Client Order Ref Mandatory",
+    "summary": """
+        Adds required client_order_ref field and reposition it
+    """,
+    "author": "Solvos, Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "version": "18.0.1.0.0",
+    "category": "Sale",
+    "website": "https://github.com/OCA/sale-workflow",
+    "depends": ["sale"],
+    "data": [
+        "views/sale_order_view.xml",
+        "report/sale_order_report_templates.xml",
+    ],
+    "installable": True,
+}
diff --git a/sale_order_client_order_ref_mandatory/i18n/es.po b/sale_order_client_order_ref_mandatory/i18n/es.po
new file mode 100644
index 00000000000..ec62a2324e3
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/i18n/es.po
@@ -0,0 +1,21 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* sale_order_client_order_ref_mandatory
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 18.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2025-07-02 07:08+0000\n"
+"PO-Revision-Date: 2025-07-02 07:08+0000\n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: sale_order_client_order_ref_mandatory
+#: model_terms:ir.ui.view,arch_db:sale_order_client_order_ref_mandatory.view_order_form
+msgid "Enter the customer reference here"
+msgstr "Introduzca aquí la referencia del cliente"
diff --git a/sale_order_client_order_ref_mandatory/models/__init__.py b/sale_order_client_order_ref_mandatory/models/__init__.py
new file mode 100644
index 00000000000..6aacb753131
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/models/__init__.py
@@ -0,0 +1 @@
+from . import sale_order
diff --git a/sale_order_client_order_ref_mandatory/models/sale_order.py b/sale_order_client_order_ref_mandatory/models/sale_order.py
new file mode 100644
index 00000000000..1b7be9bcfe6
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/models/sale_order.py
@@ -0,0 +1,13 @@
+# © 2025 Solvos Consultoría Informática (<http://www.solvos.es>)
+# License AGPL-3 - See http://www.gnu.org/licenses/agpl-3.0.html
+from odoo import fields, models
+
+
+class SaleOrder(models.Model):
+    _inherit = "sale.order"
+
+    client_order_ref = fields.Char(
+        string="Customer Reference",
+        copy=False,
+        default="/",
+    )
diff --git a/sale_order_client_order_ref_mandatory/pyproject.toml b/sale_order_client_order_ref_mandatory/pyproject.toml
new file mode 100644
index 00000000000..4231d0cccb3
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"
diff --git a/sale_order_client_order_ref_mandatory/readme/CONTRIBUTORS.md b/sale_order_client_order_ref_mandatory/readme/CONTRIBUTORS.md
new file mode 100644
index 00000000000..44e11fb7b52
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/readme/CONTRIBUTORS.md
@@ -0,0 +1,4 @@
+- [Solvos](https://www.solvos.es)
+    - Christian Santamaría \<<christian.santamaria@solvos.es>\>
+    - David Alonso \<<david.alonso@solvos.es>\>
+    - Dante Pereyra \<<dante.pereyra@solvos.es>\>
diff --git a/sale_order_client_order_ref_mandatory/readme/DESCRIPTION.md b/sale_order_client_order_ref_mandatory/readme/DESCRIPTION.md
new file mode 100644
index 00000000000..9954b5c01b9
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/readme/DESCRIPTION.md
@@ -0,0 +1,15 @@
+For a Sale Order, makes required client_order_ref field and reposition it,
+for both form view and Sale reports.
+Also makes this field searchable and add an optional column on both quotation and sale orders lists
+
+## Sale Order Form View
+### Before
+![sale_order_before](../static/description/client_sale_order_ref_before_image.png)
+### After
+![sale_order_after](../static/description/client_sale_order_ref_after_image.png)
+
+## Sale Report
+### Before
+![template_before](../static/description/client_sale_order_ref_template_before_image.png)
+### After
+![template_after](../static/description/client_sale_order_ref_template_after_image.png)
diff --git a/sale_order_client_order_ref_mandatory/report/sale_order_report_templates.xml b/sale_order_client_order_ref_mandatory/report/sale_order_report_templates.xml
new file mode 100644
index 00000000000..c946c24ea2e
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/report/sale_order_report_templates.xml
@@ -0,0 +1,18 @@
+<odoo>
+    <template
+        id="report_saleorder_document"
+        inherit_id="sale.report_saleorder_document"
+    >
+        <xpath expr="//div[@id='informations']" position="before">
+            <h3>
+                <span t-field="doc.client_order_ref" />
+            </h3>
+        </xpath>
+        <xpath
+            expr="//div[@t-field='doc.client_order_ref']/parent::div"
+            position="attributes"
+        >
+            <attribute name="t-if">False</attribute>
+        </xpath>
+    </template>
+</odoo>
diff --git a/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_after_image.png b/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_after_image.png
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diff --git a/sale_order_client_order_ref_mandatory/static/description/index.html b/sale_order_client_order_ref_mandatory/static/description/index.html
new file mode 100644
index 00000000000..54318860e62
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/static/description/index.html
@@ -0,0 +1,448 @@
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+  list-style-type: none }
+
+</style>
+</head>
+<body>
+<div class="document" id="sale-order-client-order-ref-mandatory">
+<h1 class="title">Sale Order Client Order Ref Mandatory</h1>
+
+<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!! This file is generated by oca-gen-addon-readme !!
+!! changes will be overwritten.                   !!
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!! source digest: sha256:7958cbf2a8aa393f6b649de571594b362d2043e10285117f485b8cfa5a33e49f
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
+<p><a class="reference external image-reference" href="https://odoo-community.org/page/development-status"><img alt="Beta" src="https://img.shields.io/badge/maturity-Beta-yellow.png" /></a> <a class="reference external image-reference" href="http://www.gnu.org/licenses/agpl-3.0-standalone.html"><img alt="License: AGPL-3" src="https://img.shields.io/badge/licence-AGPL--3-blue.png" /></a> <a class="reference external image-reference" href="https://github.com/OCA/sale-workflow/tree/18.0/sale_order_client_order_ref_mandatory"><img alt="OCA/sale-workflow" src="https://img.shields.io/badge/github-OCA%2Fsale--workflow-lightgray.png?logo=github" /></a> <a class="reference external image-reference" href="https://translation.odoo-community.org/projects/sale-workflow-18-0/sale-workflow-18-0-sale_order_client_order_ref_mandatory"><img alt="Translate me on Weblate" src="https://img.shields.io/badge/weblate-Translate%20me-F47D42.png" /></a> <a class="reference external image-reference" href="https://runboat.odoo-community.org/builds?repo=OCA/sale-workflow&amp;target_branch=18.0"><img alt="Try me on Runboat" src="https://img.shields.io/badge/runboat-Try%20me-875A7B.png" /></a></p>
+<p>For a Sale Order, makes required client_order_ref field and reposition
+it, for both form view and Sale reports. Also makes this field
+searchable and add an optional column on both quotation and sale orders
+lists</p>
+<div class="section" id="sale-order-form-view">
+<h1>Sale Order Form View</h1>
+<div class="section" id="before">
+<h2>Before</h2>
+<p><img alt="sale_order_before" src="https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_before_image.png" /></p>
+</div>
+<div class="section" id="after">
+<h2>After</h2>
+<p><img alt="sale_order_after" src="https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_after_image.png" /></p>
+</div>
+</div>
+<div class="section" id="sale-report">
+<h1>Sale Report</h1>
+<div class="section" id="before-1">
+<h2>Before</h2>
+<p><img alt="template_before" src="https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_template_before_image.png" /></p>
+</div>
+<div class="section" id="after-1">
+<h2>After</h2>
+<p><img alt="template_after" src="https://raw.githubusercontent.com/OCA/sale-workflow/18.0/sale_order_client_order_ref_mandatory/static/description/client_sale_order_ref_template_after_image.png" /></p>
+<p><strong>Table of contents</strong></p>
+<div class="contents local topic" id="contents">
+<ul class="simple">
+<li><a class="reference internal" href="#bug-tracker" id="toc-entry-1">Bug Tracker</a></li>
+<li><a class="reference internal" href="#credits" id="toc-entry-2">Credits</a></li>
+</ul>
+</div>
+<div class="section" id="bug-tracker">
+<h3><a class="toc-backref" href="#toc-entry-1">Bug Tracker</a></h3>
+<p>Bugs are tracked on <a class="reference external" href="https://github.com/OCA/sale-workflow/issues">GitHub Issues</a>.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+<a class="reference external" href="https://github.com/OCA/sale-workflow/issues/new?body=module:%20sale_order_client_order_ref_mandatory%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**">feedback</a>.</p>
+<p>Do not contact contributors directly about support or help with technical issues.</p>
+</div>
+<div class="section" id="credits">
+<h3><a class="toc-backref" href="#toc-entry-2">Credits</a></h3>
+</div>
+</div>
+</div>
+<div class="section" id="authors">
+<h1>Authors</h1>
+<ul class="simple">
+<li>Solvos</li>
+</ul>
+</div>
+<div class="section" id="contributors">
+<h1>Contributors</h1>
+<ul class="simple">
+<li><a class="reference external" href="https://www.solvos.es">Solvos</a><ul>
+<li>Christian Santamaría &lt;<a class="reference external" href="mailto:christian.santamaria&#64;solvos.es">christian.santamaria&#64;solvos.es</a>&gt;</li>
+<li>David Alonso &lt;<a class="reference external" href="mailto:david.alonso&#64;solvos.es">david.alonso&#64;solvos.es</a>&gt;</li>
+<li>Dante Pereyra &lt;<a class="reference external" href="mailto:dante.pereyra&#64;solvos.es">dante.pereyra&#64;solvos.es</a>&gt;</li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="section" id="maintainers">
+<h1>Maintainers</h1>
+<p>This module is maintained by the OCA.</p>
+<a class="reference external image-reference" href="https://odoo-community.org">
+<img alt="Odoo Community Association" src="https://odoo-community.org/logo.png" />
+</a>
+<p>OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.</p>
+<p>This module is part of the <a class="reference external" href="https://github.com/OCA/sale-workflow/tree/18.0/sale_order_client_order_ref_mandatory">OCA/sale-workflow</a> project on GitHub.</p>
+<p>You are welcome to contribute. To learn how please visit <a class="reference external" href="https://odoo-community.org/page/Contribute">https://odoo-community.org/page/Contribute</a>.</p>
+</div>
+</div>
+</body>
+</html>
diff --git a/sale_order_client_order_ref_mandatory/views/sale_order_view.xml b/sale_order_client_order_ref_mandatory/views/sale_order_view.xml
new file mode 100644
index 00000000000..3dd12af991a
--- /dev/null
+++ b/sale_order_client_order_ref_mandatory/views/sale_order_view.xml
@@ -0,0 +1,72 @@
+<odoo>
+    <record id="view_order_form" model="ir.ui.view">
+        <field
+            name="name"
+        >sale.order.form (in sale_order_client_order_ref_mandatory)</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_form" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='client_order_ref']" position="attributes">
+                <attribute name="invisible">1</attribute>
+                <attribute name="required">1</attribute>
+            </xpath>
+            <xpath expr="//group[@name='sale_header']" position="before">
+                <group>
+                    <h2>
+                        <field
+                            name="client_order_ref"
+                            required="1"
+                            nolabel="1"
+                            placeholder="Enter the customer reference here"
+                        />
+                    </h2>
+                </group>
+            </xpath>
+        </field>
+    </record>
+
+    <record id="view_sales_order_filter" model="ir.ui.view">
+        <field
+            name="name"
+        >sale.order.list.select (in sale_order_client_order_ref_mandatory)</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_sales_order_filter" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='partner_id']" position="after">
+                <field name="client_order_ref" />
+            </xpath>
+        </field>
+    </record>
+
+    <record id="view_quotation_tree" model="ir.ui.view">
+        <field
+            name="name"
+        >sale.order.list (in sale_order_client_order_ref_mandatory)</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_quotation_tree" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='client_order_ref']" position="attributes">
+                <attribute name="column_invisible">1</attribute>
+            </xpath>
+            <xpath expr="//field[@name='partner_id']" position="after">
+                <field name="client_order_ref" optional="show" />
+            </xpath>
+        </field>
+    </record>
+
+    <record id="view_order_tree" model="ir.ui.view">
+        <field
+            name="name"
+        >sale.order.list (orders) (in sale_order_client_order_ref_mandatory)</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_tree" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='client_order_ref']" position="attributes">
+                <attribute name="column_invisible">1</attribute>
+            </xpath>
+            <xpath expr="//field[@name='partner_id']" position="after">
+                <field name="client_order_ref" optional="show" />
+            </xpath>
+        </field>
+    </record>
+</odoo>