We process payment upon receipt of your order and begin the production of your custom UE Pro In Ear Monitors immediately upon receiving your ear impressions. If you have not yet sent your impressions to our Irvine production facility and you need to cancel your order for any reason, contact us as soon as possible so that we may remit applicable charges back to your credit card. Your custom UE Pro IEMs are built to your specification, so once we receive your impressions, your order cannot be cancelled, changed, refunded and/or credited for another product. Within the first 30 days of receipt of your custom product, you may return for "fit" adjustments if necessary. Please see our limited warranty for more specifics.