If you notice that a patient has the same payment amount for both credit and an outstanding invoice, it may mean that the collected payment wasn't linked to the appropriate invoice.
To link the payment to the appointment:
1. Click Edit near the invoice in the individual patient history.
2. Go to the bottom of the payment and click Update Invoice & Record Payment.
3. Select the invoice that you want to pay for, open the drop-down list in Gift Card / Credit column and select the appropriate credit item.
4. Click Apply Payment.
As a result, the payment will be applied to the selected invoice, the invoice will be marked as Paid in Full, and the credit amount will disappear from the patient's credit summary.