nrr

I'm on sbb's email list, and they offer special day pass promos, which can only be purchased on-line (generally with short purchase periods). How does one retrieve such a purchase?
[I live in the USA and visit Switz. regularly, but if they mail me the purchase I'm not sure I would receive it in time.]
When I've purchased 1/2 fare cards (at ZRH Flufg.), they hold the card in their file cabinet until my next visit.

Q-STO

I am not sure that I understood your question.
On-line promos can be printed at home - you don't need to have them mailed to your residence.

Re "Halbtax-Abo": I renewed it online and could print a temporary confirmation. The new card was mailed to me a week later.

nrr

In the Nov. SBB Newsletter, there is an offer where you can get a after 9 o'clock day card which is good even on Sat./Sun/Public holidays--but expires on Nov. 17 (you don't have to have a 1/2 fare card to use it.)
[I current have a "6 pack" day card, with validation tabs.] I was assuming that the on-line offer was a single validation card (which would require getting it by mail(?) From reading your response, they would allow me to present the "print at home" document.
Since I won't be in Switz. until Nov. 28, that particular offer won't be good for me--but there will be future offers which might.
Re Halbtax-Abo: (as I noted in my OP), I would renew it at the SBB Travel Agency in ZRH Flug. and they would hold the card until the next time I visit Switz.
Thanks for your response.

PS: Added note: I re-read the offer, and it states "travel pass" (as opposed to travel card)--so I think it is different from the usual travel cards, which have validation tabs.

Q-STO

Yes - it is not the usual validation card, but a "print at home" ticket.
I had no problem buying them from abroad.