How Can I Refund Tips?

Tips cannot be refunded in Commerce7. If a tip was incorrectly charged it has to be refunded in the payment gateway. 

We restrict this because the tip belongs to the server instead of the business. For example, if the payment was cash, the tip collected would be taken by the server/staff right away and a refund would not include the tip. The same logic can be applied to credit card payments, so we don't include Tips when an order is refunded.