Howdy,
We are interested in buying the half fare card for travel to Switzerland (9 days).
Could we purchase it at one of the border cities near Chamonix? Say Martigny?
I see there is free guest passes when staying in Chamonix hotels, with the Chamonix express being covered by the pass. Technically we could take that train to leave Chamonix and get off in Martigny and then get our half fare cards and purchase tickets to Interlaken?