diff --git a/picking_policy_per_customer/__init__.py b/picking_policy_per_customer/__init__.py
new file mode 100644
index 0000000..0650744
--- /dev/null
+++ b/picking_policy_per_customer/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/picking_policy_per_customer/__manifest__.py b/picking_policy_per_customer/__manifest__.py
new file mode 100644
index 0000000..c64195c
--- /dev/null
+++ b/picking_policy_per_customer/__manifest__.py
@@ -0,0 +1,23 @@
+{
+    'name': 'Customer Specific Picking Policy',
+    'version': '18.0.1.0.0',
+    'category': 'Sales',
+    'summary': 'Configure picking policy (delivery orders) per customer',
+    'description': """
+        This module allows you to set specific picking policies per customer.
+        It extends the default global picking policy setting to be configurable at the customer level.
+    """,
+    'author': 'Bemade',
+    'website': 'https://bemade.org',
+    'depends': [
+        'sale',
+        'stock',
+    ],
+    'data': [
+        'views/res_partner_views.xml',
+    ],
+    'license': 'LGPL-3',
+    'installable': True,
+    'auto_install': False,
+    'application': False,
+}
\ No newline at end of file
diff --git a/picking_policy_per_customer/models/__init__.py b/picking_policy_per_customer/models/__init__.py
new file mode 100644
index 0000000..17c6cc8
--- /dev/null
+++ b/picking_policy_per_customer/models/__init__.py
@@ -0,0 +1,2 @@
+from . import res_partner
+from . import sale_order
diff --git a/picking_policy_per_customer/models/res_partner.py b/picking_policy_per_customer/models/res_partner.py
new file mode 100644
index 0000000..b014e9f
--- /dev/null
+++ b/picking_policy_per_customer/models/res_partner.py
@@ -0,0 +1,19 @@
+from odoo import fields, models
+
+
+class ResPartner(models.Model):
+    """
+    Extends the partner model to add customer-specific picking policy preferences.
+    
+    This extension allows setting a default picking (shipping) policy at the customer level,
+    which will be used as the default value when creating sales orders for this customer.
+    """
+    _inherit = 'res.partner'
+
+    picking_policy = fields.Selection([
+        ('direct', 'Deliver each product when available'),
+        ('one', 'Deliver all products at once')],
+        string='Shipping Policy',
+        help='Select how to handle multi-product deliveries:\n'
+             '- Deliver each product when available: products will be shipped as soon as they are available\n'
+             '- Deliver all products at once: products will be shipped altogether when all of them are available')
diff --git a/picking_policy_per_customer/models/sale_order.py b/picking_policy_per_customer/models/sale_order.py
new file mode 100644
index 0000000..efcf08f
--- /dev/null
+++ b/picking_policy_per_customer/models/sale_order.py
@@ -0,0 +1,19 @@
+from odoo import api, models
+
+
+class SaleOrder(models.Model):
+    _inherit = 'sale.order'
+
+    @api.onchange('partner_id')
+    def _onchange_partner_id(self):
+        if self.partner_id and self.partner_id.picking_policy:
+            self.picking_policy = self.partner_id.picking_policy
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            if vals.get('partner_id'):
+                partner = self.env['res.partner'].browse(vals['partner_id'])
+                if partner.picking_policy:
+                    vals['picking_policy'] = partner.picking_policy
+        return super().create(vals_list)
\ No newline at end of file
diff --git a/picking_policy_per_customer/views/res_partner_views.xml b/picking_policy_per_customer/views/res_partner_views.xml
new file mode 100644
index 0000000..873f372
--- /dev/null
+++ b/picking_policy_per_customer/views/res_partner_views.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="view_partner_form_inherit_picking_policy" model="ir.ui.view">
+        <field name="name">res.partner.form.inherit.picking.policy</field>
+        <field name="model">res.partner</field>
+        <field name="inherit_id" ref="base.view_partner_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//page[@name='sales_purchases']//group[@name='sale']" position="inside">
+                <field name="picking_policy"/>
+            </xpath>
+        </field>
+    </record>
+</odoo>
diff --git a/purchase_customer_requisition/__init__.py b/purchase_customer_requisition/__init__.py
new file mode 100644
index 0000000..0650744
--- /dev/null
+++ b/purchase_customer_requisition/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/purchase_customer_requisition/__manifest__.py b/purchase_customer_requisition/__manifest__.py
new file mode 100644
index 0000000..62997ec
--- /dev/null
+++ b/purchase_customer_requisition/__manifest__.py
@@ -0,0 +1,27 @@
+{
+    'name': 'Purchase Customer Requisition',
+    'version': '1.0',
+    'category': 'Purchase',
+    'summary': 'Link customer requisition references to purchase orders',
+    'description': """
+        This module allows to:
+        * Store customer-specific requisition references for suppliers
+        * Automatically add these references to purchase order lines
+        * Track customer requisition numbers across purchase orders
+    """,
+    'license': 'LGPL-3',
+    'depends': [
+        'purchase', 
+        'sale_purchase',
+        'purchase_requisition'
+    ],
+    'data': [
+        'security/ir.model.access.csv',
+        'views/customer_supplier_requisition_views.xml',
+        'views/purchase_views.xml',
+        'views/purchase_requisition_views.xml',
+    ],
+    'installable': True,
+    'application': False,
+    'auto_install': False,
+}
\ No newline at end of file
diff --git a/purchase_customer_requisition/models/__init__.py b/purchase_customer_requisition/models/__init__.py
new file mode 100644
index 0000000..cddeb79
--- /dev/null
+++ b/purchase_customer_requisition/models/__init__.py
@@ -0,0 +1,3 @@
+from . import customer_supplier_requisition
+from . import purchase_order_line
+from . import purchase_requisition
diff --git a/purchase_customer_requisition/models/customer_supplier_requisition.py b/purchase_customer_requisition/models/customer_supplier_requisition.py
new file mode 100644
index 0000000..cc5efdd
--- /dev/null
+++ b/purchase_customer_requisition/models/customer_supplier_requisition.py
@@ -0,0 +1,37 @@
+from odoo import models, fields, api
+
+class CustomerSupplierRequisition(models.Model):
+    _name = 'customer.supplier.requisition'
+    _description = 'Customer Supplier Requisition Reference'
+
+    customer_id = fields.Many2one(
+        comodel_name='res.partner', 
+        string='Customer', 
+        required=True,
+        domain=[
+            ('customer_rank', '>', 0)
+            ]
+        )
+
+    supplier_id = fields.Many2one(
+        comodel_name='res.partner', 
+        string='Supplier', 
+        required=True,
+        domain=[
+            ('supplier_rank', '>', 0)]
+            )
+
+    requisition_ref = fields.Char(
+        string='Requisition Reference', 
+        required=True,
+        help='Reference number used by the supplier for this customer'
+        )
+
+    active = fields.Boolean(
+        default=True
+        )
+
+    _sql_constraints = [
+        ('unique_customer_supplier', 'unique(customer_id, supplier_id)',
+         'A requisition reference already exists for this customer-supplier pair!')
+    ]
diff --git a/purchase_customer_requisition/models/purchase_order_line.py b/purchase_customer_requisition/models/purchase_order_line.py
new file mode 100644
index 0000000..49f4013
--- /dev/null
+++ b/purchase_customer_requisition/models/purchase_order_line.py
@@ -0,0 +1,32 @@
+from odoo import models, fields, api
+
+class PurchaseOrderLine(models.Model):
+    _inherit = 'purchase.order.line'
+
+    customer_requisition_ref = fields.Char(
+        string='Customer Requisition Ref',
+        compute='_compute_customer_requisition_ref',
+        store=True,
+        help='Customer requisition reference for this supplier'
+    )
+
+    @api.depends('sale_line_id.order_id.partner_id', 'order_id.partner_id')
+    def _compute_customer_requisition_ref(self):
+        for line in self:
+            if line.sale_line_id and line.sale_line_id.order_id.partner_id and line.order_id.partner_id:
+                requisition = self.env['customer.supplier.requisition'].search([
+                    ('customer_id', '=', line.sale_line_id.order_id.partner_id.id),
+                    ('supplier_id', '=', line.order_id.partner_id.id)
+                ], limit=1)
+                line.customer_requisition_ref = requisition.requisition_ref if requisition else False
+            else:
+                line.customer_requisition_ref = False
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        lines = super().create(vals_list)
+        for line in lines:
+            if line.customer_requisition_ref:
+                if line.name:
+                    line.name = f"[{line.customer_requisition_ref}] {line.name}"
+        return lines
diff --git a/purchase_customer_requisition/models/purchase_requisition.py b/purchase_customer_requisition/models/purchase_requisition.py
new file mode 100644
index 0000000..e44a579
--- /dev/null
+++ b/purchase_customer_requisition/models/purchase_requisition.py
@@ -0,0 +1,41 @@
+from odoo import models, fields, api
+
+class PurchaseRequisition(models.Model):
+    _inherit = 'purchase.requisition'
+
+    customer_id = fields.Many2one(
+        comodel_name='res.partner',
+        string='Customer',
+        domain=[('customer_rank', '>', 0)],
+        help='Customer for whom this requisition is created'
+    )
+    
+    customer_requisition_ref = fields.Char(
+        string='Customer Requisition Ref',
+        compute='_compute_customer_requisition_ref',
+        store=True,
+        help='Customer requisition reference'
+    )
+
+    @api.depends('customer_id', 'vendor_id')
+    def _compute_customer_requisition_ref(self):
+        for requisition in self:
+            if requisition.customer_id and requisition.vendor_id:
+                ref = self.env['customer.supplier.requisition'].search([
+                    ('customer_id', '=', requisition.customer_id.id),
+                    ('supplier_id', '=', requisition.vendor_id.id)
+                ], limit=1)
+                requisition.customer_requisition_ref = ref.requisition_ref if ref else False
+            else:
+                requisition.customer_requisition_ref = False
+
+    def action_in_progress(self):
+        res = super().action_in_progress()
+        for requisition in self:
+            if requisition.customer_requisition_ref:
+                # Update all related PO lines description
+                for po in requisition.purchase_ids:
+                    for line in po.order_line:
+                        if line.name and not line.name.startswith(f'[{requisition.customer_requisition_ref}]'):
+                            line.name = f'[{requisition.customer_requisition_ref}] {line.name}'
+        return res
diff --git a/purchase_customer_requisition/security/ir.model.access.csv b/purchase_customer_requisition/security/ir.model.access.csv
new file mode 100644
index 0000000..e37c325
--- /dev/null
+++ b/purchase_customer_requisition/security/ir.model.access.csv
@@ -0,0 +1,3 @@
+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_customer_supplier_requisition_user,customer.supplier.requisition.user,model_customer_supplier_requisition,purchase.group_purchase_user,1,0,0,0
+access_customer_supplier_requisition_manager,customer.supplier.requisition.manager,model_customer_supplier_requisition,purchase.group_purchase_manager,1,1,1,1
diff --git a/purchase_customer_requisition/views/customer_supplier_requisition_views.xml b/purchase_customer_requisition/views/customer_supplier_requisition_views.xml
new file mode 100644
index 0000000..cae46ee
--- /dev/null
+++ b/purchase_customer_requisition/views/customer_supplier_requisition_views.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="view_customer_supplier_requisition_tree" model="ir.ui.view">
+        <field name="name">customer.supplier.requisition.list</field>
+        <field name="model">customer.supplier.requisition</field>
+        <field name="arch" type="xml">
+            <list>
+                <field name="customer_id"/>
+                <field name="supplier_id"/>
+                <field name="requisition_ref"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="view_customer_supplier_requisition_form" model="ir.ui.view">
+        <field name="name">customer.supplier.requisition.form</field>
+        <field name="model">customer.supplier.requisition</field>
+        <field name="arch" type="xml">
+            <form string="Customer Supplier Requisition">
+                <sheet>
+                    <group>
+                        <group>
+                            <field name="customer_id"/>
+                            <field name="supplier_id"/>
+                        </group>
+                        <group>
+                            <field name="requisition_ref"/>
+                            <field name="active"/>
+                        </group>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <record id="action_customer_supplier_requisition" model="ir.actions.act_window">
+        <field name="name">Customer Supplier Requisitions</field>
+        <field name="res_model">customer.supplier.requisition</field>
+        <field name="view_mode">list,form</field>
+        <field name="help" type="html">
+            <p class="o_view_nocontent_smiling_face">
+                Create your first customer supplier requisition reference
+            </p>
+        </field>
+    </record>
+
+    <menuitem id="menu_customer_supplier_requisition"
+        name="Customer Requisitions"
+        action="action_customer_supplier_requisition"
+        parent="purchase.menu_purchase_config"
+        sequence="6"/>
+</odoo>
diff --git a/purchase_customer_requisition/views/purchase_requisition_views.xml b/purchase_customer_requisition/views/purchase_requisition_views.xml
new file mode 100644
index 0000000..d4cb6c2
--- /dev/null
+++ b/purchase_customer_requisition/views/purchase_requisition_views.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="view_purchase_requisition_form_inherit" model="ir.ui.view">
+        <field name="name">purchase.requisition.form.inherit</field>
+        <field name="model">purchase.requisition</field>
+        <field name="inherit_id" ref="purchase_requisition.view_purchase_requisition_form"/>
+        <field name="arch" type="xml">
+            <field name="vendor_id" position="after">
+                <field name="customer_id"/>
+                <field name="customer_requisition_ref" invisible="not customer_id"/>
+            </field>
+        </field>
+    </record>
+
+    <record id="view_purchase_requisition_list_inherit" model="ir.ui.view">
+        <field name="name">purchase.requisition.list.inherit</field>
+        <field name="model">purchase.requisition</field>
+        <field name="inherit_id" ref="purchase_requisition.view_purchase_requisition"/>
+        <field name="arch" type="xml">
+            <xpath expr="//list" position="inside">
+                <field name="customer_id" optional="show"/>
+            </xpath>
+        </field>
+    </record>
+</odoo>
diff --git a/purchase_customer_requisition/views/purchase_views.xml b/purchase_customer_requisition/views/purchase_views.xml
new file mode 100644
index 0000000..04b38f1
--- /dev/null
+++ b/purchase_customer_requisition/views/purchase_views.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="purchase_order_form_inherit" model="ir.ui.view">
+        <field name="name">purchase.order.form.inherit</field>
+        <field name="model">purchase.order</field>
+        <field name="inherit_id" ref="purchase.purchase_order_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='order_line']/list" position="inside">
+                <field name="customer_requisition_ref" optional="show"/>
+            </xpath>
+            <xpath expr="//field[@name='order_line']/form//field[@name='product_id']" position="before">
+                <field name="customer_requisition_ref"/>
+            </xpath>
+        </field>
+    </record>
+</odoo>