diff --git a/vendor/magento/module-customer/etc/validation.xml b/vendor/magento/module-customer/etc/validation.xml
index bac6e54afa7b5..114733e66d04d 100644
--- a/vendor/magento/module-customer/etc/validation.xml
+++ b/vendor/magento/module-customer/etc/validation.xml
@@ -46,11 +46,17 @@
                     <constraint alias="eav_data_validator" class="Magento\Eav\Model\Validator\Attribute\Data" />
                 </entity_constraints>
             </rule>
+            <rule name="check_name">
+                <entity_constraints>
+                    <constraint alias="name_validator" class="Magento\Customer\Model\Validator\Name" />
+                </entity_constraints>
+            </rule>
         </rules>
         <groups>
             <group name="save">
                 <uses>
                     <use rule="check_eav"/>
+                    <use rule="check_name"/>
                 </uses>
             </group>
         </groups>
diff --git a/vendor/magento/module-quote/Model/CustomerManagement.php b/vendor/magento/module-quote/Model/CustomerManagement.php
index 3607cf7f9be63..a45e798f15162 100644
--- a/vendor/magento/module-quote/Model/CustomerManagement.php
+++ b/vendor/magento/module-quote/Model/CustomerManagement.php
@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2014 Adobe
+ * All Rights Reserved.
  */
 declare(strict_types=1);
 
@@ -10,6 +10,7 @@
 use Magento\Customer\Api\AccountManagementInterface as AccountManagement;
 use Magento\Customer\Api\AddressRepositoryInterface as CustomerAddressRepository;
 use Magento\Customer\Api\CustomerRepositoryInterface as CustomerRepository;
+use Magento\Customer\Api\Data\AddressInterfaceFactory;
 use Magento\Customer\Model\AddressFactory;
 use Magento\Framework\App\ObjectManager;
 use Magento\Framework\Validator\Exception as ValidatorException;
@@ -46,11 +47,17 @@ class CustomerManagement
      */
     private $addressFactory;
 
+    /**
+     * @var AddressInterfaceFactory
+     */
+    private $customerAddressFactory;
+
     /**
      * CustomerManagement constructor.
      * @param CustomerRepository $customerRepository
      * @param CustomerAddressRepository $customerAddressRepository
      * @param AccountManagement $accountManagement
+     * @param AddressInterfaceFactory $customerAddressFactory
      * @param ValidatorFactory|null $validatorFactory
      * @param AddressFactory|null $addressFactory
      */
@@ -58,12 +65,14 @@ public function __construct(
         CustomerRepository $customerRepository,
         CustomerAddressRepository $customerAddressRepository,
         AccountManagement $accountManagement,
+        AddressInterfaceFactory $customerAddressFactory,
         ValidatorFactory $validatorFactory = null,
         AddressFactory $addressFactory = null
     ) {
         $this->customerRepository = $customerRepository;
         $this->customerAddressRepository = $customerAddressRepository;
         $this->accountManagement = $accountManagement;
+        $this->customerAddressFactory = $customerAddressFactory;
         $this->validatorFactory = $validatorFactory ?: ObjectManager::getInstance()
             ->get(ValidatorFactory::class);
         $this->addressFactory = $addressFactory ?: ObjectManager::getInstance()
@@ -150,18 +159,29 @@ public function validateAddresses(QuoteEntity $quote)
                 $quote->getShippingAddress()->getCustomerAddressId()
             );
         }
-        if (!empty($addresses)) {
-            foreach ($addresses as $address) {
-                $validator = $this->validatorFactory->createValidator('customer_address', 'save');
-                $addressModel = $this->addressFactory->create();
-                $addressModel->updateData($address);
-                if (!$validator->isValid($addressModel)) {
-                    throw new ValidatorException(
-                        null,
-                        null,
-                        $validator->getMessages()
-                    );
-                }
+        if (empty($addresses) && $quote->getCustomerIsGuest()) {
+            $billingAddress = $quote->getBillingAddress();
+            $customerAddress = $this->customerAddressFactory->create();
+            $customerAddress->setFirstname($billingAddress->getFirstname());
+            $customerAddress->setLastname($billingAddress->getLastname());
+            $customerAddress->setStreet($billingAddress->getStreet());
+            $customerAddress->setCity($billingAddress->getCity());
+            $customerAddress->setPostcode($billingAddress->getPostcode());
+            $customerAddress->setTelephone($billingAddress->getTelephone());
+            $customerAddress->setCountryId($billingAddress->getCountryId());
+            $customerAddress->setCustomAttributes($billingAddress->getCustomAttributes());
+            $addresses[] = $customerAddress;
+        }
+        foreach ($addresses as $address) {
+            $validator = $this->validatorFactory->createValidator('customer_address', 'save');
+            $addressModel = $this->addressFactory->create();
+            $addressModel->updateData($address);
+            if (!$validator->isValid($addressModel)) {
+                throw new ValidatorException(
+                    null,
+                    null,
+                    $validator->getMessages()
+                );
             }
         }
     }
diff --git a/vendor/magento/module-quote/Model/QuoteManagement.php b/vendor/magento/module-quote/Model/QuoteManagement.php
index 51b68411d4080..3f16ef5da0d78 100644
--- a/vendor/magento/module-quote/Model/QuoteManagement.php
+++ b/vendor/magento/module-quote/Model/QuoteManagement.php
@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2014 Adobe
+ * All Rights Reserved.
  */
 declare(strict_types=1);
 
@@ -530,10 +530,10 @@ protected function submitQuote(QuoteEntity $quote, $orderData = [])
         if (!$quote->getCustomerIsGuest()) {
             if ($quote->getCustomerId()) {
                 $this->_prepareCustomerQuote($quote);
-                $this->customerManagement->validateAddresses($quote);
             }
             $this->customerManagement->populateCustomerInfo($quote);
         }
+        $this->customerManagement->validateAddresses($quote);
         $addresses = [];
         $quote->reserveOrderId();
         if ($quote->isVirtual()) {