Not all gemeinde tageskarte are restricted to you living there, some gemeinden let you have them if your not from there it tells you on there websites....

They are like fresh buns though they go really fast. they cost anything between 28 and 35 chf the last time i looked.

You will only be asked where you live and a proof of where you live when you buy the card after that it doesn't matter.

So if you are having visitors and wanted a card for them you buy it and give it to them....

The card is valid for the day (and only that day) which is on the card.

They are good value for money...

Yes you it's safe to buy these cards on ricardo.....

happy traveling