Refunding your annual GA travelcard.
If you no longer require your annual GA travelcard, you can return it. The refund is calculated per month of use and not per day. A charge of 23% of the purchase price for the first month of validity and 7% for any additional month will be subtracted from the refund sum, along with a handling fee. If your GA travelcard serves as a basic GA travelcard (GA travelcard for adults, GA travelcard for young adults, GA travelcard for students (ages 25–30), GA travelcard for senior citizens or GA travelcard for the disabled), cancellation is only possible when all the associated GA travelcards are given back at the same time.
Link for address and more details (click on Services and scroll down) : http://www.sbb.ch/en/travelcards-and...ga/adults.html