Hello Adityaishu24
Unfortunately, this is a problem because the Half Fare Card must effectively be valid on the day of travel. The ticket inspector will check your ticket as well as the validity of your ½ card. In the contrary, your Half Fare Card does not have to be valid during ticket purchase.
You have two options now:
- you are going to renew the Half Fare Card before the day of travel or
- you are going to ask for a refund (subject to 10 CHF administration fee) and buy a full fare Saver Day Pass. See the link to the refund request form below.
https://www.sbb.ch/en/help-and-contact/refunds-compensation/ticket-refunds.html
Best regards,
Roland