SATE-EasyReceipt/app/Events/ReceiptIssuingOrder/MailPostedEvent.php

<?php

namespace App\Events\ReceiptIssuingOrder;

/**
 * 郵送投函イベント
 */
class MailPostedEvent extends ReceiptIssuingOrderEvent
{
    public function getEventName(): string
    {
        return "郵送投函";
    }
}