Void feature can be used in the case that you mistakenly enter in the wrong payment and want to cancel it. This means the transaction does not go through and you don’t have to issue a refund.
Please note that you only have until 6 pm NZ, AU, or US EST to do this or else you need to issue a refund, and then it will take 3-5 business days for the funds to get back to the cardholders account