Refund Service The payPalRefundService service: ■ Enables you to perform a full refund for an order. ■ Enables you to perform multiple partial refunds for an order. When you request payPalRefundService, you must include the following fields in the request: ■ payPalRefundService_run ■ payPalRefundService_paypalCaptureId—This value determines which capture will be refunded. ■ payPalRefundService_paypalDoCaptureRequestID—This value determines which capture will be refunded. ■ payPalRefundService_paypalDoCaptureRequestToken ■ merchantID ■ merchantReferenceCode ■ purchaseTotals_grandTotalAmount—The amount of the refund determines if it is a full refund or a partial refund. Additional fields are optional. The required and optional fields are described in Appendix A, API Fields.