To send Letters through the Swiss Post Label Printer app you will need to have a Swiss Post Account and have your Customer ID & Password. In this section we will show you how to get both needed information.
Click on this Link.
Create your Swiss Post Login by clicking on Register.
Click on "Online services"
Search for "WebStamp" and click on "Start"
Click on "Webstamp Settings
Click on "Webservice Webstamp"
Create a Password
Copy your Client ID & Password to the Swiss Post Label Printer app
You are DONE 🙌