Einen E-Mail Empfänger hinzufügen wenn die Bestellung komplett ist

function woo_extra_email_recipient($recipient, $object) {
    $recipient = $recipient . ', your@email.com';
    return $recipient;
}
add_filter( 'woocommerce_email_recipient_customer_completed_order', 'woo_extra_email_recipient', 10, 2);