The overpayment was made over 7 months ago and now the customer would like a refund by check. When you go back to the Receive Payment screen for the original payment from 7 months ago, there is no option to edit it back to refund the customer. It just simply sits there as an overpayment. I know not to create a credit memo, but how would you remove the overpayment and issue a refund? That is my question.