diff --git a/Model/Order/CompleteOrder.php b/Model/Order/CompleteOrder.php
new file mode 100644
index 00000000..3ac3f47b
--- /dev/null
+++ b/Model/Order/CompleteOrder.php
@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Bold\Checkout\Model\Order;
+
+use Bold\Checkout\Api\Http\ClientInterface;
+use Bold\Checkout\Model\ResourceModel\Order\OrderExtensionData;
+use Bold\Checkout\Model\ResourceModel\Order\OrderExtensionData as OrderExtensionDataResource;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Sales\Api\Data\OrderInterface;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Mark the Order as created on the Bold side.
+ */
+class CompleteOrder
+{
+    private const COMPLETE_URL = 'checkout/orders/{{shop_id}}/%s/complete';
+
+    /**
+     * @var ClientInterface
+     */
+    private $client;
+
+    /**
+     * @var OrderExtensionDataFactory
+     */
+    private $orderExtensionDataFactory;
+
+    /**
+     * @var OrderExtensionDataResource
+     */
+    private $orderExtensionDataResource;
+
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
+    /**
+     * @param ClientInterface $client
+     * @param OrderExtensionDataFactory $orderExtensionDataFactory
+     * @param OrderExtensionDataResource $orderExtensionDataResource
+     * @param LoggerInterface $logger
+     */
+    public function __construct(
+        ClientInterface            $client,
+        OrderExtensionDataFactory  $orderExtensionDataFactory,
+        OrderExtensionDataResource $orderExtensionDataResource,
+        LoggerInterface $logger
+    ) {
+        $this->client = $client;
+        $this->orderExtensionDataFactory = $orderExtensionDataFactory;
+        $this->orderExtensionDataResource = $orderExtensionDataResource;
+        $this->logger = $logger;
+    }
+
+    /**
+     * Mark the Order as created on the Bold side.
+     *
+     * @param OrderInterface $order
+     * @return void
+     * @throws LocalizedException
+     */
+    public function execute(OrderInterface $order): void
+    {
+        $websiteId = (int)$order->getStore()->getWebsiteId();
+        $publicOrderId = $this->getOrderPublicId($order);
+        $orderId = $order->getEntityId();
+        $body = [
+            'platform_order_id' => $orderId,
+        ];
+        $url = sprintf(self::COMPLETE_URL, $publicOrderId);
+        $response = $this->client->post($websiteId, $url, $body);
+        if ($response->getStatus() !== 200) {
+            $this->logger->error(__('Failed to complete order with id="%1"', $orderId));
+        }
+    }
+
+    /**
+     * Retrieve order public id.
+     *
+     * @param OrderInterface $order
+     * @return string
+     * @throws LocalizedException
+     */
+    private function getOrderPublicId(OrderInterface $order): string
+    {
+        $orderExtensionData = $this->orderExtensionDataFactory->create();
+        $this->orderExtensionDataResource->load($orderExtensionData, $order->getId(), OrderExtensionData::ORDER_ID);
+        if (!$orderExtensionData->getPublicId()) {
+            throw new LocalizedException(__('Order public id is not set.'));
+        }
+
+        return $orderExtensionData->getPublicId();
+    }
+}
diff --git a/Model/Order/PlaceOrder/CreateOrderFromPayload/CreateOrderFromQuote.php b/Model/Order/PlaceOrder/CreateOrderFromPayload/CreateOrderFromQuote.php
index 5743c335..470bc012 100644
--- a/Model/Order/PlaceOrder/CreateOrderFromPayload/CreateOrderFromQuote.php
+++ b/Model/Order/PlaceOrder/CreateOrderFromPayload/CreateOrderFromQuote.php
@@ -141,6 +141,7 @@ public function create(CartInterface $quote, OrderDataInterface $orderPayload):
             [
                 'order' => $order,
                 'quote' => $quote,
+                'order_payload' => $orderPayload,
             ]
         );
 
diff --git a/Observer/Order/SaveOrderExtensionDataObserver.php b/Observer/Order/CheckoutSubmitAllAfterObserver.php
similarity index 77%
rename from Observer/Order/SaveOrderExtensionDataObserver.php
rename to Observer/Order/CheckoutSubmitAllAfterObserver.php
index c84bf4cf..37508392 100644
--- a/Observer/Order/SaveOrderExtensionDataObserver.php
+++ b/Observer/Order/CheckoutSubmitAllAfterObserver.php
@@ -3,6 +3,8 @@
 
 namespace Bold\Checkout\Observer\Order;
 
+use Bold\Checkout\Api\Data\PlaceOrder\Request\OrderDataInterface;
+use Bold\Checkout\Model\Order\CompleteOrder;
 use Bold\Checkout\Model\Order\OrderExtensionDataFactory;
 use Bold\Checkout\Model\ResourceModel\Order\OrderExtensionData as OrderExtensionDataResource;
 use Exception;
@@ -10,11 +12,12 @@
 use Magento\Framework\Event\ManagerInterface as EventManagerInterface;
 use Magento\Framework\Event\Observer;
 use Magento\Framework\Event\ObserverInterface;
+use Magento\Framework\Exception\LocalizedException;
 
 /**
- * Save order extension data.
+ * Perform after order submit actions.
  */
-class SaveOrderExtensionDataObserver implements ObserverInterface
+class CheckoutSubmitAllAfterObserver implements ObserverInterface
 {
     /**
      * @var OrderExtensionDataFactory
@@ -41,11 +44,17 @@ class SaveOrderExtensionDataObserver implements ObserverInterface
      */
     private $boldPaymentMethods;
 
+    /**
+     * @var CompleteOrder
+     */
+    private $completeOrder;
+
     /**
      * @param OrderExtensionDataFactory $orderExtensionDataFactory
      * @param OrderExtensionDataResource $orderExtensionDataResource
      * @param Session $checkoutSession
      * @param EventManagerInterface $eventManager
+     * @param CompleteOrder $completeOrder
      * @param array $boldPaymentMethods
      */
     public function __construct(
@@ -53,6 +62,7 @@ public function __construct(
         OrderExtensionDataResource $orderExtensionDataResource,
         Session $checkoutSession,
         EventManagerInterface $eventManager,
+        CompleteOrder $completeOrder,
         array $boldPaymentMethods = []
     ) {
         $this->orderExtensionDataFactory = $orderExtensionDataFactory;
@@ -60,13 +70,15 @@ public function __construct(
         $this->checkoutSession = $checkoutSession;
         $this->eventManager = $eventManager;
         $this->boldPaymentMethods = $boldPaymentMethods;
+        $this->completeOrder = $completeOrder;
     }
 
     /**
-     * Save order extension data.
+     * Perform after order submit actions.
      *
      * @param Observer $observer
      * @return void
+     * @throws LocalizedException
      */
     public function execute(Observer $observer)
     {
@@ -80,6 +92,11 @@ public function execute(Observer $observer)
         $orderId = (int)$order->getEntityId();
         $publicOrderId = $this->checkoutSession->getBoldCheckoutData()['data']['public_order_id'] ?? null;
         $this->checkoutSession->setBoldCheckoutData(null);
+        if (!$publicOrderId) {
+            /** @var OrderDataInterface $orderPayload */
+            $orderPayload = $observer->getEvent()->getOrderPayload();
+            $publicOrderId = $orderPayload ? $orderPayload->getPublicId() : null;
+        }
         if (!$publicOrderId) {
             return;
         }
@@ -95,5 +112,6 @@ public function execute(Observer $observer)
         } catch (Exception $e) {
             return;
         }
+        $this->completeOrder->execute($order);
     }
 }
diff --git a/etc/di.xml b/etc/di.xml
index e262cd68..d6cd5acf 100644
--- a/etc/di.xml
+++ b/etc/di.xml
@@ -62,6 +62,11 @@
             <argument name="client" xsi:type="object">Bold\Checkout\Model\Http\BoldClient</argument>
         </arguments>
     </type>
+    <type name="Bold\Checkout\Model\Order\CompleteOrder">
+        <arguments>
+            <argument name="client" xsi:type="object">Bold\Checkout\Model\Http\BoldClient</argument>
+        </arguments>
+    </type>
     <type name="Bold\Checkout\Model\Payment\Gateway\Service">
         <arguments>
             <argument name="httpClient" xsi:type="object">Bold\Checkout\Model\Http\BoldClient</argument>
@@ -146,7 +151,7 @@
             </argument>
         </arguments>
     </type>
-    <type name="Bold\Checkout\Observer\Order\SaveOrderExtensionDataObserver">
+    <type name="Bold\Checkout\Observer\Order\CheckoutSubmitAllAfterObserver">
         <arguments>
             <argument name="boldPaymentMethods" xsi:type="array">
                 <item name="bold_checkout" xsi:type="string">bold</item>
diff --git a/etc/events.xml b/etc/events.xml
index 079d32e9..03e95311 100644
--- a/etc/events.xml
+++ b/etc/events.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
     <event name="checkout_submit_all_after">
-        <observer name="save_order_extension_data" instance="Bold\Checkout\Observer\Order\SaveOrderExtensionDataObserver"/>
+        <observer name="bold_checkout_submit_all_after" instance="Bold\Checkout\Observer\Order\CheckoutSubmitAllAfterObserver"/>
     </event>
     <event name="sales_order_shipment_save_after">
         <observer name="fulfill_order_items" instance="Bold\Checkout\Observer\Order\Shipment\FulfillOrderItemsObserver"/>