Data protection method during data transfer in a taximeter

A method for data backup in a data transmission, in particular of tariff parameters in a taximeter or odometer, is described by the use of a signature bill and a display. To ensure a correct transfer of the tariff parameters, the signature R (x) (= remainder of a division) is determined after completion of the parameterization of the device and reported in sealed form to the checking calibration office. Taximeter devices with newly entered parameter set can be checked at the calibration office in a shortened manner, in that a renewed device-internal calculation and display of the signature R (x) takes place and is compared with the transmitted signature R (x).