Why does the monthly pass need to be pre-purchased 2 days in advance?

By pre-purchasing two days in advance, there will be no overlap between the validity period of your current monthly pass and the next one. Pre-purchasing 2 days in advance is necessary so that, in the event of a technical error, the system has the possibility to retry before your previous pass expires.

If you no longer need this function, you can switch off the automatic re-purchase at any time during these two days and get a refund for your pass that is not yet valid.