One of the most popular biometric time clock attendance systems is punch card attendance system. A punch card is a flat and stiff paper with notches cut in it and contains digital information. In punch card attendance system, employees use this punch or proximity card for in and/or out. To use a punch card, employees just need to wave the card near a reader, which then ensures whether the correct person is logging in and/or out.
Punch card attendance system prevents the proxy attendance and records the accurate in and/or out time of each employee. Like all good things come along with bad things, punch card attendance system also has a few disadvantages, it has a complex software and hardware and needs expensive machines to install.