Void Refund Credit Check
To void a customer refund, go to Income -> Payments -> Void Payments.
Enter the date of the check, or a date range wide enough to include the check, and the customer to whom the check was written. Press Next.
The check will show in the list as a negative amount with phrasing similar to Refund Issued. Put a checkmark in the Void box and click Void Selections to void the payment.