Klarna Docs - Refund an order

Refund an order

Use the Order management API to refund the items on a captured order.

When your customers return the items they bought and you need to refund that order, use this API call to credit the amount back to your customers.

The following diagram depicts how this API call works:

Sequence diagram of the API call to refund an order.

If you want to learn how to correctly allocate refunds when you deliver in multiple shipments, see the Refund allocation section.

To refund the amount of an order, send a POST  request to the {apiUrl}/ordermanagement/v1/orders/{order_id}/refunds  endpoint.

Include the following in your request:


  • Klarna-Idempotency-Key : This header will guarantee the idempotency of the operation. The key should be unique and is recommended to be a UUID version 4. Retries of requests are safe to be applied in case of errors such as network errors, socket errors and timeouts.


  • refunded_amount (required): the total order amount to be refunded. It must be less or equal to the captured_amount from the order capture
  • reference (optional): Internal reference to the refund. This will be included in the settlement files.
  • description (optional): text to add details of the refunds. Your customers can see this description
  • order_lines (optional): list of details associated with this refund. We highly recommend you send order lines as they allow us to locate the refund to the right capture (consumer invoice). Order lines are also helpful for your customers to visualize the refunded amount in the Klarna app
  "refunded_amount": 100000000",
  "reference": "9dfcd4b6-9428-4835-ad93-3720ea808608",
  "description": "Description of the refund shown to the customer",
  "order_lines": [
      "image_url": "https://yourstore.example/product/headphones.png",
      "merchant_data": "Some metadata",
      "name": "string",
      "product_identifiers": {

Sample of a request to refund an order.

If the request is successful, you'll receive a 201 Created response, including refund_id and location as HTTP response headers.

Error response

If your request contains errors, you'll receive an error response. Make sure the order is already captured and the order_id is correct.

You can use the correlation_id and the order_id values to troubleshoot the call in the Merchant portal logs section.

  "error_code": "REFUND_NOT_ALLOWED",
  "error_messages": [
    "Over refund is not allowed. Refund not possible."
  "correlation_id": "7863c755-eb1b-4b24-a884-06c2368389d7"

Sample of an error response to refund an order.

Ready to send this request? See the API reference of this call.