A return authorization must be obtained from Avidity Science, LLC before returning any goods, new or defective. Proof of purchase such as the original invoice number or purchase order number has to be provided. Merchandise can be returned for credit only if the product is the current model or design, is in original packaging and is subject to a minimum 15% restocking fee. Customer pays all shipping charges on returned goods. Please note: custom made merchandise cannot be returned. If you have any questions regarding our refund policy please contact us.