Hi Benson
Thank you for your request.
After the first day of validity, the season ticket is only refundable if proof of non-use is provided. A fee is also charged. You must clarify this directly with the SBB Contact Center: phone 0848 44 66 88 (CHF 0.08/min) / from abroad +41 51 225 78 56.
I wish you a nice day.
Kind regards,
LeaG