Hello shanghai
Thank you for your enquiry.
The GA Duo Partner has a discount. You can find the prices and information here.
You can change at any time. You will find the order form at the bottom right of the downloads. Under point 8 you will find the required documents. The form for the confirmation of residence from the municipality can also be found in the downloads. You can send the order form to the Contact Centre in Brig or hand it in at a railway station.
If you have any questions, we are there for you.
Have a nice day.
Greetings, ZoeS