Technical and Integration

“A fulfillment action for Shopify order XXX/ Klarna order id XXX for store NXXXXX has resulted in an error. To determine the cause of the error, please review the order in your Shopify admin tool and in the Klarna merchant portal.”

If you’ve received this email then an order fulfillment has failed. This can be due to an order being expired or already captured in the Merchant Portal. Contact Merchant Support if further assistance is needed.

Some first steps to go through if your integration does not work:

• Make sure that test mode is switched off.
• Make sure that the Klarna API credentials are entered in the correct place in your plugin.
• Make sure you have the correct version of Klarna’s plugin installed.

If you can not see Klarna’s iframe it might be due to:

• Klarna’s plugin is not activated.
• The page with terms and conditions is not linked.
• Another plugin is disrupting Klarna’s plugin.
• The design of your webshop, meaning your theme, is not compatible with Klarna’s plugin.

Check the following:

– If you use Klarna API Credentials for production, make sure that the test mode is switched off.
– If you use Klarna API Credentials for our test environment, make sure that the test mode is switched on.
– If the problem is still there please contact our Merchant Support for further assistance.

Make sure that the shipping method is entered correctly. If you use Magento, it might also be because Magento requires details in the checkout that Klarna does not collect, such as state and province.

To test your checkout you will need test Klarna API Credentials. These can be found by signing up here with the same login details you use for the Merchant Portal. It’s important to note that regular Klarna API credentials will not work with test mode in your ecommerce. You can find more information about our Playground Enviornment here

To be able to start integrating with Klarna you need to have a functional website. This means that you need to have information on your products and it need to be possible to add products to a shopping cart.

Your username and password are your Klarna API Credentials. If you do not have your Klarna API Credentials, you can generate these by going to the Settings app in the Merchant Portal.

Automatically onboarded merchants can use the Merchant Portal Products App to complete integration. If further assistance is needed our Developers Page contains more information. For Merchants onboarded with the help of a sales representative, our team will reach out to assist with integration.

Go to the Settings app in the Merchant Portal. There you can generate new Klarna API Credentials by clicking on “Generate new API-credentials”. Remember to save the new Klarna API Credentials since you will only be able to see them once.

Klarna offers a simple tool to insert dynamic payment plans directly on your web store. Follow the instructions at https://developers.klarna.com/documentation/on-site-messaging/integration/ to get started with the On-site Marketing Platform.

By adding the Klarna badge(s) to your website, your shoppers will know they have trusted payment options at time of checkout. Head to https://guidelines.klarna.com/co-marketing#/merchants to retrieve the payment badges for your site.

We have assembled a toolkit complete with logos, icons, text, and other inspiration to be used on your website. Read more about promoting Klarna payment options to your shoppers at https://guidelines.klarna.com/co-marketing-us.