How can I Hide Validation-Only WooCommerce Checkout Fields from Order Summaries and Emails?

Below is one approach to hide these fields from the order summary (and emails) while still using them for validation during checkout. The idea is to “strip out” these meta values from the order once it’s created. You can do this by using a filter on the order meta data that WooCommerce displays.

For example, try adding this code to your theme’s functions.php or a custom plugin:

PHPCopied
add_filter( 'woocommerce_order_formatted_meta_data', 'hide_validation_fields_from_order_summary', 10, 2 );
function hide_validation_fields_from_order_summary( $formatted_meta, $order ) {
    // List the meta keys to remove from the order summary
    $validation_fields = array(
        'namespace/agree-terms',
        'namespace/agree-marketing',
        // add other fields as needed
    );

    foreach ( $formatted_meta as $key => $meta ) {
        if ( in_array( $meta->key, $validation_fields, true ) ) {
            unset( $formatted_meta[ $key ] );
        }
    }

    return $formatted_meta;
}

How It Works

• Filter Hook:
  The woocommerce_order_formatted_meta_data filter lets you modify the meta data before it’s displayed in order summaries and emails.

• Validation Fields Array:
  We define an array containing your custom field meta keys. Adjust or extend this array as needed.

• Unsetting Meta Data:
  For each formatted meta item, if the key is in our list, we remove it from the $formatted_meta array, effectively hiding it from display.

This way, the fields will still be available for checkout validation, but they won’t appear in the order details, emails, or any other summaries where WooCommerce uses that meta data.

If you find that the block-based checkout is using a different mechanism to render the order summary, you might also need to check if additional filters (or custom block settings) are required. However, in general, filtering the formatted meta data as shown should do the trick.