Why do I get 2 sets of billing documents for my vehicle for the same period?

The billing documents contain the licence plate number, the EURO emission class, the vehicle’s weight of the vehicle and the payment method chosen. If any of these characteristics is changed, you will receive a separate set of billing documents for the trips made with this specific combination of characteristics (e.g. if you drive for 2 days with a EURO emission class 3 and then adapt it to EURO emission class 4, you will receive 2 sets of billing documents).

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