Driver name not displayed or shows unauthorised driver

My fleet with plate number SGD 8989 was driven by Mr. John, but the fleet management platform displays ‘unauthorised driver. Please clarify.

If a driver name is not displayed or “Unauthorised Driver” is displayed for your fleet, please verify if “Driver Identification” mode is not made active without assigning a valid ibutton to the driver. You may verify the same from Settings>>Vehicles>>Driver Identification(edit).

If issue persists, you may send an email to support@avlview.com