Change reported time: Once the time is posted it cannot be changed: is this correct? We do not want people to be able to change their time once they post it. We also want to try to eliminate paper time records and keep all of our time reporting secure electronically.
That is quite correct and yours is exactly the scenario TimeCard is built for. Users cannot change their time once they post it, paper time records are eliminated and the time reporting are kept secure electronically.
If a mistake has been made, though, there is a possibility for the admin to change the erroneous appointment in the database.