/api/v1/orders/cancel-orderpost https://uat-merchant-services.fiservapp.com/boarding-ui/external-api/maintenance/api/v1/orders/cancel-orderPost API Cancel OrderBody ParamsmerchantIdstringrequiredlength between 0 and 15referenceNumberIdstringrequiredlength between 0 and 12codeReasonCancellationstringrequiredlogicalTerminalstringrequiredlength between 8 and 8Response 200OKUpdated 21 days ago