Rail Europe からの回答
Hello Hideharu,
The policy (fare conditions of the booking) are set forth by the carrier and are also displayed at the time of booking (before finalizing the purchase) and also once you've confirmed the booking - so that the passengers are aware of the booking conditions, before finalizing the purchase and also after the purchase is made.
I hope the above justifies.
In case if you have queries ahead, you can contact our customer support team by clicking on the "Help" option on our website, then scroll down to the bottom and click on the "more help" option in the bottom right corner to proceed to fill the contact-us form.
Once your request has reached us, one of our representatives will be glad to assist.