Usually you will find the ticket number at the printed front side of the lift ticket. It consists of 4 numbers separated by a hyphen. Prior to the first number there might be a * (which should not be entered).
On this picture you can see the 4 numbers within the blue frame. In this example it would be:
25 0039 01 46749
Alternatively there might be threepart number printed at the front side of the skipass. This may look like this:
On this picture you can see the 3 numbers within the blue frame. In this example it would be:
8000 765 3600
If you cannot find the 4 part lift ticket number, you might use the chipnumber printed on the flip side of the lift ticket. The chipnumber is usually a long number with blocks of 4 digits separated by a space.
01 1256 7698 3123 8986 6765 9
Enter this number (without the last single digit) and the date of your skiing day. In this example you would have to enter
0112567698312389866765