If you have a new driver and he receives a new RFID card or other authorization device with a chip, you can add its ID to the driver profile by yourself.

However, you need to make sure you have the correct chip ID, you can check it by authorizing it in the vehicle where you have already installed reader.
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Once it is done, you will see the correct chip ID that Mapon recognizes in the Driver history. This ID should be added then to the Driver profile in the iButton field.