1. Go to Back Office, Advanced Set Up, search for negative 2. Set allowNegativeOrder , negativeCreditAmount and negativeOpenPrice to Y and save global in advanced set up 3. Set minimumCreditAmount to the amount to be refunded times -1, for example, if you want to refund $100, set minimumCreditAmount to -100, save global 4. Create an open item in menu set up, and set it as Non-Taxable, then save 5. Create a Carry-Out Order, press the newly created open item in the menu enter the negative dollar amount 6. Add the item to the order, then click on pay, select Credit 7. The PAX should show CREDIT RETURN, insert the credit card, process the transaction and complete the order.