Nah, undocumented overtime is a thing in germany, too, for example. Most jobs, especially in smaller businesses have what's called "Vertrauensarbeitszeit"(trust based timekeeping). You don't punch in anywhere, you just show up at the job, and are expected to manage your own time. Studies found that this leads to people working approx. 41-42h/week instead of the contractually agreed-upon 40h/week, with the difference not being paid, since it is undocumented. The EU/ECJ declared this to be a problem and now all businesses have to implement some form of electronic timekeeping.