Klarna Checkout nav Get started IntroductionRecurring paymentsGoogle analytics and e-commerce trackingOptimizing your checkout when using an Iframe-based checkoutCheckout flow rewriteCompatible pluginsKlarna On-site MessagingKlarna Order ManagementKlarna Shipping Assistant Customization Hooks (action & filter)Extra checkout fieldsExtra merchant data (EMD)External payment method (EPM)KCO-GlobalCheckout page language Troubleshooting Embedded checkouts in WooCommerce Error codes Compatible plugins Known compatibility issues Shipping Methods in iframe FAQ Optimizing your checkout when using an Iframe-based checkout Callbacks Troubleshooting the checkout flow Pending payment orders and held stock