The card timeclock has been stuck to the entrance wall for decades. It works for clocking in and out, yes, but the day an employee sues you and asks for their attendance record, that cardboard card won't save you. If you are going to change your timeclock, it is better to choose well the first time. Here are the criteria that truly matter, viewed from the perspective of the Mexican employer who has to be accountable to the Labor Board and the payroll department.