diff --git a/src/Message/Checkout/PurchaseRequest.php b/src/Message/Checkout/PurchaseRequest.php
index d3d2386d..9f5b39a8 100644
--- a/src/Message/Checkout/PurchaseRequest.php
+++ b/src/Message/Checkout/PurchaseRequest.php
@@ -145,14 +145,37 @@ public function getClientReferenceId()
         return $this->getParameter('client_reference_id');
     }
 
+    /**
+     * Set the customer_creation parameter
+     *
+     * @param string $value
+     *
+     * @return \Omnipay\Common\Message\AbstractRequest|PurchaseRequest
+     */
+    public function setCustomerCreation($value)
+    {
+        return $this->setParameter('customer_creation', $value);
+    }
+
+    /**
+     * Get the customer_creation parameter
+     *
+     * @return string
+     */
+    public function getCustomerCreation()
+    {
+        return $this->getParameter('customer_creation');
+    }
 
     public function getData()
     {
         $data = array(
+            'client_reference_id' => $this->getClientReferenceId(),
             'success_url' => $this->getSuccessUrl(),
             'cancel_url' => $this->getCancelUrl(),
             'payment_method_types' => $this->getPaymentMethodTypes(),
             'mode' => $this->getMode(),
+            'customer_creation' => $this->getCustomerCreation(),
             'line_items' => $this->getLineItems()
         );
 
diff --git a/src/Message/PaymentIntents/AuthorizeRequest.php b/src/Message/PaymentIntents/AuthorizeRequest.php
index 4a0ec8ad..5154042f 100644
--- a/src/Message/PaymentIntents/AuthorizeRequest.php
+++ b/src/Message/PaymentIntents/AuthorizeRequest.php
@@ -329,6 +329,42 @@ public function getOffSession()
         return $this->getParameter('off_session');
     }
 
+    /**
+     * @return mixed
+     */
+    public function getConfirmationMethod()
+    {
+        return $this->getParameter('confirmation_method');
+    }
+
+    /**
+     * @param string $value
+     *
+     * @return AbstractRequest provides a fluent interface.
+     */
+    public function setConfirmationMethod($value)
+    {
+        return $this->setParameter('confirmation_method', $value);
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getCaptureMethod()
+    {
+        return $this->getParameter('capture_method');
+    }
+
+    /**
+     * @param string $value
+     *
+     * @return AbstractRequest provides a fluent interface.
+     */
+    public function setCaptureMethod($value)
+    {
+        return $this->setParameter('capture_method', $value);
+    }
+
     /**
      * @inheritdoc
      */
@@ -392,8 +428,13 @@ public function getData()
 
         $data['off_session'] = $this->getOffSession() ? 'true' : 'false';
 
-        $data['confirmation_method'] = 'manual';
-        $data['capture_method'] = 'manual';
+        if ($this->getConfirmationMethod()) {
+            $data['confirmation_method'] = $this->getConfirmationMethod();
+        }
+
+        if ($this->getCaptureMethod()) {
+            $data['capture_method'] = $this->getCaptureMethod();
+        }
 
         $data['confirm'] = $this->getConfirm() ? 'true' : 'false';
 
diff --git a/src/Message/PaymentIntents/CreatePaymentMethodRequest.php b/src/Message/PaymentIntents/CreatePaymentMethodRequest.php
index 61ee03d0..32c3642a 100644
--- a/src/Message/PaymentIntents/CreatePaymentMethodRequest.php
+++ b/src/Message/PaymentIntents/CreatePaymentMethodRequest.php
@@ -117,7 +117,7 @@ public function getBillingDetails()
                 'country' => $data['address_country'],
                 'line1' => $data['address_line1'],
                 'line2' => $data['address_line2'],
-                'postal_code' => $data['address_zip'],
+                'postal_code' => $data['address_zip'] ?? null,
                 'state' => $data['address_state'],
             ]),
         ]);
diff --git a/tests/Message/Checkout/PurchaseRequestTest.php b/tests/Message/Checkout/PurchaseRequestTest.php
new file mode 100644
index 00000000..801d701b
--- /dev/null
+++ b/tests/Message/Checkout/PurchaseRequestTest.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Omnipay\Stripe\Message\Checkout;
+
+use Omnipay\Tests\TestCase;
+
+class PurchaseRequestTest extends TestCase
+{
+    /**
+     * @var PurchaseRequest
+     */
+    protected $request;
+
+    public function setUp()
+    {
+        $this->request = new PurchaseRequest($this->getHttpClient(), $this->getHttpRequest());
+        $this->request->initialize(
+            array(
+                'client_reference_id' => 'cart_id_123'
+            )
+        );
+    }
+
+    public function testGetData()
+    {
+        $data = $this->request->getData();
+
+        $this->assertSame('cart_id_123', $data['client_reference_id']);
+    }
+
+}