diff --git a/extension/app/code/community/Affirm/Affirm/Model/Payment.php b/extension/app/code/community/Affirm/Affirm/Model/Payment.php
index 1f8dfea..e09f0c8 100644
--- a/extension/app/code/community/Affirm/Affirm/Model/Payment.php
+++ b/extension/app/code/community/Affirm/Affirm/Model/Payment.php
@@ -559,7 +559,7 @@ public function getCheckoutObject($order)
                 'public_api_key' => Mage::helper('affirm')->getApiKey(),
                 'user_confirmation_url' => Mage::getUrl('affirm/payment/confirm', array('_secure' => true)),
                 'user_cancel_url' => Mage::helper('checkout/url')->getCheckoutUrl(),
-                'user_confirmation_url_action' => 'GET',
+                'user_confirmation_url_action' => 'POST',
                 'charge_declined_url' => Mage::helper('checkout/url')->getCheckoutUrl()
             ),
             'config' => array('required_billing_fields' => 'name,address,email'),