If you use the Telesec signature card and a contactless reader (e.g. REINER SCT cyberJack RFID Komfort), errors can occur if the signature card is in the contactless (rear) slot. The TeleSec card can work to a limited extent via contactless connections, but SigG PINs 1 and 2 cannot be used.
In this case, please use the front slot.