You can restrict entry of work time records via the entry form for employees, so they can only record time using the time clock in their user account or at the time tracking terminal.
You can also require approval for changes to work time entries, or restrict when entries can be made, for example with Start no earlier than a specific time, or restrict entering time in the past. You can also specify that certain employees only start the time clock at the time tracking terminal (and, if desired, only stop it there as well).
Learn how to change the settings for employees’ entry permissions.