Hello!
I invited a friend from Chile to come to Switzerland on December, and we bought the 4 day pass. I have the Half Fare Travelcard, and I want to know if he will be able to buy the 33 chf Trial Half Fare (without being resident of Switzerland). If not, is possible a refund of the 4 day pass? (As is not convenient for him to buy the full Half Fare Travelcard).
Regards