What is a Biometric Fingerprint Attendance Machine and How Do They Work? The biometric attendance system has changed the existing online time concepts and attendance tracking process in the current market. The methods used in the previous times were not full-proof as, in many cases, the employees could log in for the people who weren’t even present at the office. The fingerprint time attendance machine has emerged into action to win over these fundamental flaws within the system Every biometric fingerprint system can produce a unique entry code that only one person can enter. If an employee intends to proxy for a colleague, the biometric details won’t allow the person to do that.