Yes, Copay posting is allowed even if Discharge date is entered. Copay posting will be allowed through Scheduling and Transactions.
1- Settings -> Account Setup
Brief Explanation: - If the checkbox is checked then only patients under that user will be allowed charges even after discharge date.
2 - Create an Appointment for a patient with Discharge date as back date.
3 - Add post Copay for that appointment.
Post copay can only be added if patient have some charges.
If charges are added then post copay will be allowed but alert message will be displayed as shown in the screenshot.
On click OK the post copay charges will be added for patient. Also the post copay entry must not be allowed if the month is hard closed.