If you are a tourist, you are looking at the wrong product. The Swiss Half Fare Card is destined to tourists. It is valid for a total of 30 days.
Swiss Half Fare Card – Switzerland at half the price | SBB
The confusion may come from the fact that the tourist offers were named Swiss Pass until 2014, yet are offered since as Swiss Travel Pass to which the Swiss Half Fare Card as well as the Swiss Family Card do belong, too.
The Half Fare Card is the product for residents. Latter can be bought by tourists too, for example if they stay several months, yet they have to provide an address in Switzerland to which the Swiss Pass card is dispatched. The card is not sent overseas.
The Half Fare Travelcard on the SwissPass | SBB
Let us know should you need further help.