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Klarna Checkout – Extra checkout fields

With Klarna Checkout you have an embedded checkout solution that handles both payment methods and customer address fields. In some cases you might need to collect more information than the regular customer address data.

Default checkout fields

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The Klarna Checkout for WooCommerce plugin retrieve and populate following address data in WC()->customer right before the checkout form is submitted and the order is created in WooCommerce:

  • Billing First name
  • Billing Last name
  • Billing Postcode
  • Billing City
  • Billing State (if needed)
  • Billing Country
  • Phone
  • Email address
  • Shipping First name
  • Shipping Last name
  • Shipping Postcode
  • Shipping City
  • Shipping State (if needed)
  • Shipping Country

Custom checkout fields

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The plugin also handles extra checkout fields that has been added via the filter woocommerce_checkout_fields. These fields will then be displayed below the order notes textarea field.

An example

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If you add the following code as a plugin or in your themes functions.php file:

* More information about custom checkout fields: https://docs.woocommerce.com/document/tutorial-customising-checkout-fields-using-actions-and-filters
* Add the custom field to the checkout
add_action( 'woocommerce_after_order_notes', 'my_custom_checkout_field' );
function my_custom_checkout_field( $checkout ) {
'type' => 'text',
'class' => array( 'my-field-class form-row-wide' ),
'label' => __( 'Custom info' ),
'placeholder' => __( 'Enter something' ),
'required' => true,
$checkout->get_value( 'my_field_name' )
* Update the order meta with field value
add_action( 'woocommerce_checkout_update_order_meta', 'my_custom_checkout_field_update_order_meta' );
function my_custom_checkout_field_update_order_meta( $order_id ) {
if ( ! empty( $_POST['my_field_name'] ) ) {
update_post_meta( $order_id, 'My Field', sanitize_text_field( $_POST['my_field_name'] ) );

Then the field will be displayed like this:

In this case we made the field a required field. By doing that the purchase will not be finalized when pressing the Place order button until data has been entered into the Custom info field.


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Custom checkout fields that have been added to the regular WooCommerce checkout form via any of the hooks available inside the form will not be handled/processed by the Klarna Checkout plugin.

Compatibility with checkout field plugins

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If you don’t want to add extra checkout fields via custom code there are several plugins that solves this. Klarna Checkout for WooCommerce has been tested with the following checkout field plugins:

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