Following is the DayZero Systems refund policy.

You are given the opportunity to work with the trial copy for a two-week period. Whether or not you choose to take advantage of this opportunity, all sales are final when completed, non-cancellable and non-refundable. However, if a price has been found to be misapplied in the ordering process, we and Digital River reserve the right to cancel that order, cancel the license and refund your payment.