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Graphite and Carbon cards differ in their serial numbers. The first four characters of the serial number are important:

  • Graphite card – the card serial number starts with 1112… or 1212... or 1312....
  • Carbon card – the card serial number starts with 1012...

IMPORTANT: Qualified certificates on Carbon cards and Graphite cards (with serial numbers starting with 1112....) are no longer issued.

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