Yes, currently I have a Check In view (view type: form). I want to prevent my user from checking in more than one time in a day.
Based on the sharing above, I have tried to write some expression under Valid If.
However, when I tried to check in multiple times, the field for Staff ID did not turn invalid. It supposed to prompt me saying that the Staff ID field is invalid when I tried to submit the form.
Can you please advise me on how I can change my expression to make that happen?