diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ff0608a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+
+vendor/
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..fd1a99a
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,29 @@
+{
+    "name": "dewebsmid/ws_orderreference",
+    "description": "Adds an optional order reference field to the shopping cart summary.",
+    "authors": [
+        {
+            "name": "Isabelle Oving-Anno",
+            "email": "isabelle@dewebsmid.nl"
+        }
+    ],
+    "require": {
+        "php": ">=8.2.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Module\\WsOrderreference\\": "src/"
+        },
+        "classmap": [
+            "ws_orderreference.php"
+        ],
+        "exclude-from-classmap": []
+    },
+    "config": {
+        "preferred-install": "dist",
+        "prepend-autoloader": false
+    },
+    "type": "prestashop-module",
+    "author": "Isabelle Oving-Anno",
+    "license": "AFL-3.0"
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..b68d89f
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,20 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "14a8801fe935c090041cfc25afe6829f",
+    "packages": [],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": {},
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=8.2.0"
+    },
+    "platform-dev": {},
+    "plugin-api-version": "2.6.0"
+}
diff --git a/config/services.yml b/config/services.yml
new file mode 100644
index 0000000..d3c90e7
--- /dev/null
+++ b/config/services.yml
@@ -0,0 +1,18 @@
+services:
+    _defaults:
+        autowire: true
+        autoconfigure: true
+
+    # Repository - this makes it available via dependency injection
+    Module\WsOrderreference\Repository\OrderReferenceRepository:
+        public: true
+        factory: ["@doctrine.orm.default_entity_manager", getRepository]
+        arguments:
+            - Module\WsOrderreference\Entity\OrderReference
+
+    # Database installer
+    Module\WsOrderreference\Database\ReferenceInstaller:
+        public: true
+        arguments:
+            - "@doctrine.dbal.default_connection"
+            - "%database_prefix%"
diff --git a/config_nl.xml b/config_nl.xml
new file mode 100644
index 0000000..2e9e529
--- /dev/null
+++ b/config_nl.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<module>
+    <name>ws_orderreference</name>
+    <displayName><![CDATA[Orderreferentie]]></displayName>
+    <version><![CDATA[1.0.0]]></version>
+    <description><![CDATA[Voegt een optioneel orderreferentieveld toe aan het winkelwagenoverzicht.]]></description>
+    <author><![CDATA[Isabelle Oving-Anno | De Websmid b.v.]]></author>
+    <tab><![CDATA[other]]></tab>
+    <is_configurable>0</is_configurable>
+    <need_instance>0</need_instance>
+</module>
\ No newline at end of file
diff --git a/controllers/front/ajax.php b/controllers/front/ajax.php
new file mode 100644
index 0000000..0d030b3
--- /dev/null
+++ b/controllers/front/ajax.php
@@ -0,0 +1,63 @@
+<?php
+
+use Module\WsOrderreference\Entity\OrderReference;
+use Module\WsOrderreference\Repository\OrderReferenceRepository;
+
+if (file_exists(__DIR__ . '../../vendor/autoload.php')) {
+    require_once __DIR__ . '../../vendor/autoload.php';
+}
+
+class ws_orderreferenceAjaxModuleFrontController extends ModuleFrontController
+{
+    public function initContent()
+    {
+        $orderReference = Tools::getValue('order_reference_input');
+        $idCart = $this->context->cart->id;
+        
+        if (!$idCart) {
+            $this->ajaxRender(json_encode([
+                'success' => false,
+                'message' => $this->module->l('No cart found.', 'ajax')
+            ]));
+            return;
+        }
+        
+        if (!preg_match('/^[a-zA-Z0-9_\- ]+$/', $orderReference)) {
+            $this->ajaxRender(json_encode([
+                'success' => false, 
+                'message' => $this->module->l('Please enter a valid order reference. Characters allowed: a-z, 0-9, -, _ and space', 'ajax')
+            ]));
+            return;
+        }
+        
+        try {
+            /** @var \Doctrine\ORM\EntityManagerInterface $entityManager */
+            $entityManager = $this->get('doctrine.orm.default_entity_manager');
+            
+            /** @var OrderReferenceRepository $repository */
+            $repository = $entityManager->getRepository(OrderReference::class);
+        
+            $orderRef = $repository->findByCartId($idCart);
+            
+            if (!$orderRef) {
+                $orderRef = new OrderReference();
+                $orderRef->setIdCart($idCart);
+            }
+            
+            $orderRef->setOrderReference($orderReference);
+
+            $entityManager->persist($orderRef);
+            $entityManager->flush();
+            
+            $this->ajaxRender(json_encode([
+                'success' => true,
+                'message' => $this->module->l('Order reference received!', 'ajax')
+            ]));
+        } catch (Exception $e) {
+            $this->ajaxRender(json_encode([
+                'success' => false,
+                'message' => $this->module->l('Could not save order reference.', 'ajax') 
+            ]));
+        }
+    }
+}
\ No newline at end of file
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..dedd77e
--- /dev/null
+++ b/index.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Copyright since 2007 PrestaShop SA and Contributors
+ * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Academic Free License 3.0 (AFL-3.0)
+ * that is bundled with this package in the file LICENSE.md.
+ * It is also available through the world-wide-web at this URL:
+ * https://opensource.org/licenses/AFL-3.0
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@prestashop.com so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+ * versions in the future. If you wish to customize PrestaShop for your
+ * needs please refer to https://devdocs.prestashop.com/ for more information.
+ *
+ * @author    PrestaShop SA and Contributors <contact@prestashop.com>
+ * @copyright Since 2007 PrestaShop SA and Contributors
+ * @license   https://opensource.org/licenses/AFL-3.0 Academic Free License 3.0 (AFL-3.0)
+ */
+
+header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
+header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
+
+header("Cache-Control: no-store, no-cache, must-revalidate");
+header("Cache-Control: post-check=0, pre-check=0", false);
+header("Pragma: no-cache");
+
+header("Location: ../");
+exit;
diff --git a/logo.png b/logo.png
new file mode 100644
index 0000000..d0df3a7
Binary files /dev/null and b/logo.png differ
diff --git a/src/Database/ReferenceInstaller.php b/src/Database/ReferenceInstaller.php
new file mode 100644
index 0000000..2c33c4f
--- /dev/null
+++ b/src/Database/ReferenceInstaller.php
@@ -0,0 +1,82 @@
+<?php
+/**
+ *  2026 De Websmid
+ *
+ *  @author    De Websmid <contact@De Websmid.com>
+ *  @copyright 2026 De Websmid
+ *  @license   De Websmid
+ * 
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Academic Free License 3.0 (AFL-3.0).
+ * It is also available through the world-wide-web at this URL: https://opensource.org/licenses/AFL-3.0
+ */
+
+declare(strict_types=1);
+
+namespace Module\WsOrderreference\Database;
+
+use Doctrine\DBAL\Connection;
+use Doctrine\DBAL\Exception as DBALException;
+
+class ReferenceInstaller
+{
+    private Connection $connection;
+    private string $dbPrefix;
+
+    public function __construct(Connection $connection, string $dbPrefix)
+    {
+        $this->connection = $connection;
+        $this->dbPrefix = $dbPrefix;
+    }
+
+    public function createTables(): array
+    {
+        $errors = [];
+        $this->dropTables();
+        $sqlInstallFile = dirname(__DIR__) . '/Resources/data/install.sql';
+
+        $sqlContent = file_get_contents($sqlInstallFile);
+        $sqlContent = str_replace('PREFIX_', $this->dbPrefix, $sqlContent);
+        
+        $sqlQueries = array_filter(array_map('trim', explode(';', $sqlContent)));
+
+        foreach ($sqlQueries as $query) {
+            if (empty($query)) {
+                continue;
+            }
+
+            try {
+                $this->connection->executeQuery($query);
+            } catch (DBALException $e) {
+                $errors[] = [
+                    'key' => $e->getMessage(),
+                    'parameters' => [],
+                    'domain' => 'Admin.Modules.Notification',
+                ];
+            }
+        }
+        return $errors;
+    }
+
+    public function dropTables(): array
+    {
+        $errors = [];
+        $tableNames = [
+            'ws_orderreference',
+        ];
+        foreach ($tableNames as $tableName) {
+            $sql = 'DROP TABLE IF EXISTS ' . $this->dbPrefix . $tableName;
+            try {
+                $this->connection->executeQuery($sql);
+            } catch (DBALException $e) {
+                $errors[] = [
+                    'key' => $e->getMessage(),
+                    'parameters' => [],
+                    'domain' => 'Admin.Modules.Notification',
+                ];
+            }
+        }
+        return $errors;
+    }
+}
\ No newline at end of file
diff --git a/src/Entity/OrderReference.php b/src/Entity/OrderReference.php
new file mode 100644
index 0000000..5389805
--- /dev/null
+++ b/src/Entity/OrderReference.php
@@ -0,0 +1,91 @@
+<?php 
+
+/**
+ *  2026 De Websmid
+ *
+ *  @author    De Websmid <contact@De Websmid.com>
+ *  @copyright 2026 De Websmid
+ *  @license   Academic Free License 3.0 (AFL-3.0)
+ */
+
+declare(strict_types=1);
+
+namespace Module\WsOrderreference\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ORM\Table()
+ * @ORM\Entity(repositoryClass="Module\WsOrderreference\Repository\OrderReferenceRepository")
+ */
+class OrderReference
+{
+    /**
+     * @var int
+     * 
+     * @ORM\Id
+     * @ORM\Column(name="id", type="integer")
+     * @ORM\GeneratedValue(strategy="AUTO")
+     */
+    private $id;
+
+    /**
+     * @var int
+     *
+     * @ORM\Column(name="id_cart", type="integer", unique=true)
+     */
+    private $idCart;
+
+    /**
+     * @var string
+     *
+     * @ORM\Column(name="order_reference", type="string", length=255)
+     */
+    private $orderReference;
+
+    /**
+     * @return int|null
+     */
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @return int|null
+     */
+    public function getIdCart(): ?int
+    {
+        return $this->idCart;
+    }
+
+    /**
+     * @param int $idCart
+     * @return $this
+     */
+    public function setIdCart(int $idCart): self
+    {
+        $this->idCart = $idCart;
+
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getOrderReference(): string
+    {
+        return $this->orderReference;
+    }
+
+    /**
+     * @param string $orderReference
+     * @return $this
+     */
+    public function setOrderReference(string $orderReference): self
+    {
+        $this->orderReference = $orderReference;
+
+        return $this;
+    }
+}
\ No newline at end of file
diff --git a/src/Module/Install.php b/src/Module/Install.php
new file mode 100644
index 0000000..f3a325d
--- /dev/null
+++ b/src/Module/Install.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Module\WsOrderreference\Module;
+
+use Module\WsOrderreference\Database\ReferenceInstaller;
+
+trait Install
+{
+    public function install()
+    {
+        return $this->installTables() 
+            && parent::install()
+            && $this->registerHook('displayShoppingCart')
+            && $this->registerHook('displayPDFDeliverySlip')
+            && $this->registerHook('actionFrontControllerSetMedia');
+    }
+    
+    private function getInstaller(): ReferenceInstaller
+    {
+        try {
+            $installer = $this->get(ReferenceInstaller::class);
+        } catch (\Throwable $e) {
+            $installer = null;
+        }
+
+        if (!$installer) {
+            $installer = new ReferenceInstaller(
+                $this->get('doctrine.dbal.default_connection'),
+                $this->getContainer()->getParameter('database_prefix')
+            );
+        }
+
+        return $installer;
+    }
+
+    private function installTables(): bool
+    {
+        /** @var ReferenceInstaller $installer */
+        $installer = $this->getInstaller();
+        $errors = $installer->createTables();
+
+        return empty($errors);
+    }
+
+}
\ No newline at end of file
diff --git a/src/Module/actionHooks.php b/src/Module/actionHooks.php
new file mode 100644
index 0000000..2b285a0
--- /dev/null
+++ b/src/Module/actionHooks.php
@@ -0,0 +1,25 @@
+<?php 
+
+namespace Module\WsOrderreference\Module;
+
+trait actionHooks
+{
+    public function hookActionFrontControllerSetMedia($params)
+    {
+        \Media::addJsDef([
+            'ajax_url' => $this->context->link->getModuleLink($this->name, 'ajax'),
+        ]);
+        
+        $this->context->controller->registerJavascript(
+            'index.js',
+            'modules/'.$this->name.'/views/js/index.js',
+            ['position' => 'bottom', 'priority' => 150]
+        );
+
+        $this->context->controller->registerStylesheet(
+            'styles.css',
+            'modules/'.$this->name.'/views/css/styles.css',
+            ['media' => 'all', 'priority' => 150]
+        );
+    }
+}
\ No newline at end of file
diff --git a/src/Module/displayHooks.php b/src/Module/displayHooks.php
new file mode 100644
index 0000000..3e9b443
--- /dev/null
+++ b/src/Module/displayHooks.php
@@ -0,0 +1,23 @@
+<?php 
+
+namespace Module\WsOrderreference\Module;
+
+trait displayHooks
+{
+    public function hookDisplayShoppingCart($params)
+    {
+        return $this->fetch('module:ws_orderreference/views/templates/front/orderreference.tpl');
+    }
+    
+    public function hookDisplayPDFDeliverySlip($params)
+    {
+        $orderId = $params['object']->id_order;
+        
+        $orderReferenceRepo = \PrestaShop\PrestaShop\Adapter\SymfonyContainer::getInstance()->get('Module\WsOrderreference\Repository\OrderReferenceRepository');
+        $orderReference = $orderReferenceRepo->customRefByOrderId($orderId);
+
+        $this->context->smarty->assign('orderReference', $orderReference);
+
+        return $this->fetch('module:ws_orderreference/views/templates/pdf/delivery-slip.tpl');
+    }
+}
\ No newline at end of file
diff --git a/src/Repository/OrderReferenceRepository.php b/src/Repository/OrderReferenceRepository.php
new file mode 100644
index 0000000..1492597
--- /dev/null
+++ b/src/Repository/OrderReferenceRepository.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ *  2026 De Websmid
+ *
+ *  @author    De Websmid <contact@De Websmid.com>
+ *  @copyright 2026 De Websmid
+ *  @license   Academic Free License 3.0 (AFL-3.0)
+ */
+
+declare(strict_types=1);
+
+namespace Module\WsOrderreference\Repository;
+
+use Doctrine\ORM\EntityRepository;
+use Module\WsOrderreference\Entity\OrderReference;
+
+class OrderReferenceRepository extends EntityRepository
+{
+    /**
+     * Find order reference by cart ID
+     *
+     * @param int $cartId
+     * @return OrderReference|null
+     */
+    public function findByCartId(int $cartId): ?OrderReference
+    {
+        return $this->findOneBy(['idCart' => $cartId]);
+    }
+
+   // Create a function that accepts an order Id and uses the cart ID to check if there is a custom order reference.
+   // Requires an order ID as a parameter.
+   // Returns the order reference if found, otherwise returns null.
+   // Used in the display hook to show the order reference on the pdf.
+
+   // Steps to build and break the problem down:
+   // 1.) Just return the cart ID from the order ID to see if that works.
+   // 2.) Use the cart ID to find the order reference.
+
+    public function customRefByOrderId(int $orderId): ?string
+    {
+        $conn = $this->getEntityManager()->getConnection();
+        $sql = 'SELECT id_cart FROM ps_orders WHERE id_order = :orderId';
+        $stmt = $conn->prepare($sql);
+        $resultSet = $stmt->executeQuery(['orderId' => $orderId]);
+        $idCart = $resultSet->fetchOne();
+        if ($idCart) {
+            $orderReference = $this->findByCartId((int)$idCart);
+            return $orderReference ? $orderReference->getOrderReference() : null;
+        }
+        return null;
+    }
+
+}
\ No newline at end of file
diff --git a/src/Resources/data/install.sql b/src/Resources/data/install.sql
new file mode 100644
index 0000000..61de717
--- /dev/null
+++ b/src/Resources/data/install.sql
@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS `PREFIX_order_reference` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `id_cart` int(11) NOT NULL,
+  `order_reference` varchar(255) NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `id_cart` (`id_cart`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
\ No newline at end of file
diff --git a/translations/nl.php b/translations/nl.php
new file mode 100644
index 0000000..ec617ff
--- /dev/null
+++ b/translations/nl.php
@@ -0,0 +1,14 @@
+<?php
+
+global $_MODULE;
+$_MODULE = array();
+$_MODULE['<{ws_orderreference}prestashop>ws_orderreference_1e860e56970a81a1ba3e1fcb7fccc846'] = 'Orderreferentie';
+$_MODULE['<{ws_orderreference}prestashop>ws_orderreference_9f0d684399938af879ce3fb38710642c'] = 'Voegt een optioneel orderreferentieveld toe aan het winkelwagenoverzicht.';
+$_MODULE['<{ws_orderreference}prestashop>ajax_ec19148e5460115c7abda82799f02269'] = 'Geen winkelwagen gevonden.';
+$_MODULE['<{ws_orderreference}prestashop>ajax_ffc8410c88b32eb4547230088b9df62a'] = 'Voer een geldige orderreferentie in. Toegestane tekens: a-z, 0-9, -, _ en spatie';
+$_MODULE['<{ws_orderreference}prestashop>ajax_588d7a076adcf5a584c049d954496ae6'] = 'Orderreferentie ontvangen!';
+$_MODULE['<{ws_orderreference}prestashop>ajax_4602466a12672337138c0925bd5f737f'] = 'Kon orderreferentie niet opslaan.';
+$_MODULE['<{ws_orderreference}prestashop>orderreference_9f5ba9ae96aa82530d03f434f4da0670'] = 'Orderreferentie (optioneel)';
+$_MODULE['<{ws_orderreference}prestashop>orderreference_a4d3b161ce1309df1c4e25df28694b7b'] = 'Opslaan';
+$_MODULE['<{ws_orderreference}prestashop>orderreference_fe8cc190e37aa5083375088bd5873c29'] = 'Uw bestelreferentie:';
+$_MODULE['<{ws_orderreference}prestashop>delivery-slip_f8c9e6a6b5ac4fd353d569c78cbabd90'] = 'Uw aangepaste bestelreferentie:';
diff --git a/views/css/styles.css b/views/css/styles.css
new file mode 100644
index 0000000..83ad14e
--- /dev/null
+++ b/views/css/styles.css
@@ -0,0 +1,13 @@
+/* Fade out for alert */
+.fade-out {
+    animation: fadeOut 0.75s forwards;
+}
+
+@keyframes fadeOut {
+    from {
+        opacity: 1;
+    }
+    to {
+        opacity: 0;
+    }
+}
diff --git a/views/js/index.js b/views/js/index.js
new file mode 100644
index 0000000..c6dd4d5
--- /dev/null
+++ b/views/js/index.js
@@ -0,0 +1,105 @@
+document.addEventListener("DOMContentLoaded", function () {
+    // Load saved reference on page load (with retry for dynamic content)
+    loadSavedReferenceWithRetry();
+
+    // Ajax submission
+    document.addEventListener("submit", function (e) {
+        if (e.target && e.target.id === "order_reference_form") {
+            e.preventDefault();
+            const form = e.target;
+            const url = typeof ajax_url !== "undefined" ? ajax_url : null;
+            const input = document.querySelector("#order_reference_input");
+            const inputValue = input.value.trim();
+
+            fetch(url, {
+                method: "POST",
+                headers: {
+                    "Content-Type": "application/x-www-form-urlencoded",
+                    Accept: "application/json",
+                },
+                body:
+                    "ajax=1&order_reference_input=" +
+                    encodeURIComponent(inputValue),
+            })
+                .then((response) => response.json())
+                .then((data) => {
+                    if (data.success) {
+                        // Save to localStorage
+                        localStorage.setItem("order_reference", inputValue);
+                        displaySavedReference(inputValue);
+                        input.value = "";
+                    }
+                    alertFadeOut(form, data);
+                })
+                .catch((error) => {
+                    console.error(error);
+                    alertFadeOut(form, {
+                        success: false,
+                        message: "An error occurred",
+                    });
+                });
+        }
+    });
+
+    // Load saved reference with retry mechanism for dynamic content
+    function loadSavedReferenceWithRetry(attempts = 0, maxAttempts = 10) {
+        const savedReference = localStorage.getItem("order_reference");
+        if (savedReference) {
+            const success = displaySavedReference(savedReference);
+
+            if (!success && attempts < maxAttempts) {
+                setTimeout(() => {
+                    loadSavedReferenceWithRetry(attempts + 1, maxAttempts);
+                }, 100);
+            }
+        }
+    }
+
+    function displaySavedReference(value) {
+        const form = document.querySelector("#order_reference_form");
+        if (!form) return false;
+
+        const lastSubmittedContainer = form.querySelector(
+            ".last-submitted-container",
+        );
+        if (lastSubmittedContainer) {
+            const lastSubmittedSpan =
+                lastSubmittedContainer.querySelector(".last-submitted");
+            if (lastSubmittedSpan) {
+                lastSubmittedSpan.textContent = value;
+                lastSubmittedContainer.classList.remove("d-none");
+                return true;
+            }
+        }
+        return false;
+    }
+
+    // Reset alert to initial state
+    function resetAlert(alert, messageEl) {
+        alert.classList.add("d-none");
+        alert.classList.remove("alert-success", "alert-danger", "fade-out");
+        messageEl.textContent = "";
+    }
+
+    // Fade out alert and reset
+    function alertFadeOut(form, data) {
+        const alert = form.querySelector(".alert");
+        if (!alert) return;
+
+        const messageEl = alert.querySelector(".alert-message");
+        if (!messageEl) return;
+
+        // Show alert with appropriate class and message
+        alert.classList.remove("d-none");
+        alert.classList.add(data.success ? "alert-success" : "alert-danger");
+        messageEl.textContent = data.message;
+
+        // Fade out after delay
+        setTimeout(() => {
+            alert.classList.add("fade-out");
+            setTimeout(() => {
+                resetAlert(alert, messageEl);
+            }, 750); // 750ms for fade-out animation - make sure it matches in styles.css
+        }, 5000);
+    }
+});
diff --git a/views/templates/front/orderreference.tpl b/views/templates/front/orderreference.tpl
new file mode 100644
index 0000000..278ba13
--- /dev/null
+++ b/views/templates/front/orderreference.tpl
@@ -0,0 +1,21 @@
+<div class="col-lg-12 col-md-12 box card p-0" id="ref_order" style="border: 0px;">
+    <form action="#" class="p-0" method="post" id="order_reference_form">
+        <fieldset>
+            <p class="h4">{l s='Order reference (optional)' mod='ws_orderreference'}</p>
+            <div class="d-flex flex-nowrap mb-2" style="gap: 10px;">
+                <div class="form-group w-100 mb-0">
+                    <label for="order_reference_input" class="sr-only">{l s='Order reference (optional)' mod='ws_orderreference'}</label>
+                    <input type="text" class="form-control w-100 mb-0" id="order_reference_input" name="order_reference_input" value="{$order_reference_value|escape:'html':'UTF-8'}" required="required">
+                </div>
+                <button type="submit" class="btn btn-primary" id="order_reference_submit">{l s='Submit' mod='ws_orderreference'}</button>
+            </div>
+            <div class="d-none last-submitted-container mb-2">
+                <span class="text-danger">{l s='Your order reference:' mod='ws_orderreference'}</span>
+                <span class="last-submitted text-danger"></span>
+            </div>
+            <div id="order_ref_message" class="alert d-none">
+                <p class="alert-message mb-0"></p>
+            </div>
+        </fieldset>
+    </form>
+</div>
diff --git a/views/templates/pdf/delivery-slip.tpl b/views/templates/pdf/delivery-slip.tpl
new file mode 100644
index 0000000..b892fb3
--- /dev/null
+++ b/views/templates/pdf/delivery-slip.tpl
@@ -0,0 +1 @@
+<h3>{l s='Your custom order reference:' mod='ws_orderreference'} {$orderReference}</h3>
\ No newline at end of file
diff --git a/ws_orderreference.php b/ws_orderreference.php
new file mode 100644
index 0000000..6e7dbc3
--- /dev/null
+++ b/ws_orderreference.php
@@ -0,0 +1,44 @@
+<?php
+
+if (!defined('_PS_VERSION_')) {
+    exit;
+}
+
+use Module\WsOrderreference\Module\Install;
+use Module\WsOrderreference\Module\displayHooks;
+use Module\WsOrderreference\Module\actionHooks;
+
+
+if (file_exists(__DIR__ . '/vendor/autoload.php')) {
+    require_once __DIR__ . '/vendor/autoload.php';
+}
+
+class Ws_OrderReference extends Module
+{
+    /** @var OrderReferenceRepository */
+    protected $orderReferenceRepository;
+
+    use Install;
+    use displayHooks;
+    use actionHooks;
+
+    public function __construct()
+    {
+        $this->name = 'ws_orderreference';
+        $this->tab = 'other';
+        $this->version = '1.0.0';
+        $this->author = 'Isabelle Oving-Anno | De Websmid b.v.';
+        $this->need_instance = 0;
+        $this->ps_versions_compliancy = [
+            'min' => '9.0.0',
+            'max' => '9.99.99',
+        ];
+        $this -> bootstrap = true;
+
+        parent::__construct();
+
+        $this->displayName = $this->l('Order Reference');
+        $this->description = $this->l('Adds an optional order reference field to the shopping cart summary.');
+    }
+
+}
\ No newline at end of file