Can I set up an automatic clock out if employees forget to clock out?

Plans: Time, Advanced, HR Starter, HR Professional and HR Enterprise. 

Of course! If employees forget to clock out, the system will automatically clock them out at the time set by the company. An incident will be tracked in the system and employees will have to send a request to edit their tracked working time. You can set this up in "Configuration" >> "Automations" >> "Clock ins/outs"