Departures and Checked-out Reports are found inside the Reports function of the Statistics tab.
It will show all the departures and check-outs per day for a specific day.
You can customize your report by choosing ON what date or BETWEEN what dates you want to view. Also you can filter the guests by status ("waiting for guest", "checked out", etc). Please remember to hit "Search" after making some changes to the report you wish to produce.
It will show the guests' room number, name, source, check in and check out date, number of nights, room type, status, and their outstanding balance.
You can also change the status of the guest, export a CVS (spreadsheet) version of the file, and print a copy of the report inside this function.