Normally you will find the ski pass number printed on the front of the ski pass. This number consists of 3 or 4 sets of digits separated by "-".
Examples of ski pass numbers: 01-1158-4-381384, 8000-123-3600.
If such a number is not printed, you can also use the CHIP ID number shown on the back (starts with 1614...). Make sure you select the correct input mask.
Note: reloaded cards
If you bought your ski pass online and reused an old card, the ski pass number you were able to use last time will no longer work. However, the CHIP ID number of the card (starts with 1614...) still works.
In this case you can enter the CHIP ID from the back of your ski pass together with the date of your ski day.