Here is information regarding patron refunds and ticketing fees which is part of the OTS Terms of Service:
Ticket refunds may be made in full at the discretion of the Seller. Should the Seller choose to offer refunds, it is the sole responsibility of the Seller to communicate to ticket buyers any information pertaining to refunds. The Seller will incur the related credit card fees (4% + $0.30 per transaction) for each refunded transaction. If the refund is made following the date of the performance, the Seller is responsible for all per ticket fees and credit card processing fees associated with refunded purchases. Post-performance refunds must be made within 24 hours of the closing performance. Refunds, exchanges, and any other requests relating to the Seller’s customers or ticket buyers and their ticket purchases or other transactions made through the Site are the sole responsibility of the Ticket Seller. If a Ticket Buyer or customer submits a dispute with their payment provider for a purchase made through the Site for Sellers' offerings, the total amount of the original transaction in dispute, plus any fees imposed by the processor will be the responsibility of the Ticket Seller and will be charged back accordingly.
Please refer to the Terms of Service for updated information.