The lawsuit arrives, claiming 600 unpaid overtime hours from the last two years. The employer swears the employee never stayed past their scheduled time. And then the company lawyer asks what no one wants to hear: "Do you have a way to prove what time they clocked in and what time they clocked out?". If the answer is a shrug, the trial is already half-lost. Here I explain what evidence is valid to prove an employee's working hours before the Ministry of Human Capital and labor courts, how the burden of proof works, and why an unalterable digital record is the best insurance policy your company can have.