What must you always do when checking an ID with an ID reader?

This step ensures that the information displayed by the ID reader matches the details on the physical ID presented by the guest. By comparing the readout with the information on the ID, you can verify the authenticity and validity of the ID. It is not necessary to scratch the magnetic stripe or barcode, and simply swiping or scanning the ID may not be sufficient to ensure its authenticity. Comparing the readout with the information on the ID is a crucial step in the ID verification process.