Cancellation Service The payPalUpdateAgreementService service cancels a billing agreement. When you request payPalUpdateAgreementService, you must include the following fields in the request: ■ payPalUpdateAgreementService_run ■ payPalUpdateAgreementService_paypalBillingAgreementId ■ payPalUpdateAgreementService_paypalBillingAgreementStatus ■ merchantID ■ merchantReferenceCode Additional fields are optional. The required and optional fields are described in Appendix A, API Fields.