Hello roshan
The details displayed on the ticket must fundamentally correspond to the particulars of the person travelling on it. If you have made an error in the name or the date of birth, please contact your nearest manned SBB railway station before departure and present an official document (passport, ID card or driver license). Hand written alterations on an Online Ticket may only be carried out by SBB sales staff.
I wish you a wonderful day.
Best regards
jeanninesch