to add travellers,
to add a journey (ex.: add a return journey to a one-way journey)
You can only cancel your reservation on the Internet under certain conditions:
Your ticket can be exchanged and refunded,
You have validated the collection of the tickets at the station.
If you have chosen to have your tickets sent free to your home, you cannot cancel on the Internet until you have received the tickets and at least 48 hours before the departure only.
To cancel your reservation on www.voyages-sncf.com:

