If you have an unidentifiable card, you can find the cardholder or visitor it belongs to by presenting the card at a USB reader or door.
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Make sure that you have a USB reader connected to your computer, or that there is a door you can present the card at.
To search for a cardholder or visitor by using their credential:
If the card is assigned to a cardholder or visitor, the search dialog box closes and the corresponding person is selected in the cardholder or visitor list. If the card is not assigned to a cardholder or visitor, the reason that the card is rejected is displayed in the search dialog box. You can present another card, or click Cancel to stop the operation.