Fingerprint, face or card
A card proves possession, not identity — it records that a card was presented, nothing more. Card readers are still the fastest to roll out, because most organizations already issue a badge, and the cheapest per door. That trade-off is worth making where speed matters more than certainty. Where one employee clocking in for another carries a real cost, pair the reader with fingerprint or face on the same terminal rather than relying on supervision.