"Which in turn means that fingerprints are not a great means of authentication. You could use a fingerprint like you use a username, but you wouldn't want to use it instead of a password."
Which, in terms of a clocking in system is fine since the more usual way is use a card/barcode/ID badge etc which makes it simple for anyone to clock a colleague running late in so they don't get caught or dealing with lost badges. Using fingerprints may or may not be more convenient but it eliminates the likelihood of other people clocking you in or out. No doubt the employers and suppliers will hail the benefits and not mention the bit about not trusting their staff to be honest Where it becomes difficult, as in this case, is transferring the biometrics off-site and not keeping at all in house or in device.