Recurring Billing Upgrade Guide {#recurring-billing-about-guide} ================================================================ Use this guide to learn about the Recurring Billing upgrade process and find additional information. Audience and Purpose : This guide is written for merchants who use the legacy Recurring Billing service with secure storage and must update their order management system and recurring billing processes to use the upgraded Recurring Billing service that is available through the `Business Center` and the REST API. Conventions : The following special statement is used in this document: > An *Important* statement contains information essential to successfully completing a task or learning a concept. Related Documentation : Visit the [`Cybersource` documentation hub](https://developer.cybersource.com/docs.md "") to find additional technical documentation. : [*Recurring Billing Developer Guide*](https://developer.cybersource.com/docs/cybs/en-us/recurring-billing/developer/all/rest/recurring-billing-dev/recur-bill-dev-intro.md "")[*Recurring Billing Developer Guide*](https://developer.merchant.services.bankofamerica.com/docs/bofa/en-us/recurring-billing/developer/all/rest/recurring-billing-dev/recur-bill-dev-intro.md "")[*Recurring Billing Developer Guide*](https://nabgateway-developer.nab.com.au/docs/nab/en-us/recurring-billing/developer/all/rest/recurring-billing-dev/recur-bill-dev-intro.md "")[*Recurring Billing Developer Guide*](https://developer.visaacceptance.com/docs/vas/en-us/recurring-billing/developer/all/rest/recurring-billing-dev/recur-bill-dev-intro.md "") : [*Recurring Billing User Guide*](https://developer.cybersource.com/docs/cybs/en-us/recurring-billing/user/all/rest/recurring-billing-user/recur-bill-services-intro.md "")[*Recurring Billing User Guide*](https://developer.merchant.services.bankofamerica.com/docs/bofa/en-us/recurring-billing/user/all/rest/recurring-billing-user/recur-bill-services-intro.md "")[*Recurring Billing User Guide*](https://nabgateway-developer.nab.com.au/docs/nab/en-us/recurring-billing/user/all/rest/recurring-billing-user/recur-bill-services-intro.md "")[*Recurring Billing User Guide*](https://developer.visaacceptance.com/docs/vas/en-us/recurring-billing/user/all/rest/recurring-billing-user/recur-bill-services-intro.md "") : [*`Token Management Service` Developer Guide*](https://developer.cybersource.com/docs/cybs/en-us/payments/developer/ctv/rest/payments/payment-tms-process-intro/tms-cust-tkn-pay-intro.md "")[*`Token Management Service` Developer Guide*](https://developer.merchant.services.bankofamerica.com/docs/bofa/en-us/tms/developer/gpx/rest/tms/tms-overview.md "")[*`Token Management Service` Developer Guide*](https://nabgateway-developer.nab.com.au/docs/nab/en-us/tms/developer/ctv/rest/tms/tms-overview.md "")[*`Token Management Service` Developer Guide*](https://developer.visaacceptance.com/docs/vas/en-us/tms/developer/ctv/rest/tms/tms-overview.md "") : [*Unified Checkout Integration Developer Guide*](https://developer.cybersource.com/docs/cybs/en-us/unified-checkout/developer/all/rest/unified-checkout/uc-intro.md "")[*Unified Checkout Integration Developer Guide*](https://developer.merchant.services.bankofamerica.com/docs/bofa/en-us/unified-checkout/developer/all/rest/unified-checkout/uc-intro.md "")[*Unified Checkout Integration Developer Guide*](https://nabgateway-developer.nab.com.au/docs/nab/en-us/unified-checkout/developer/all/rest/unified-checkout/uc-intro.md "")[*Unified Checkout Integration Developer Guide*](https://developer.visaacceptance.com/docs/vas/en-us/unified-checkout/developer/all/rest/unified-checkout/uc-intro.md "") : [*TMS - Secure Storage to Token Management Service Migration, Integration guidance*](https://support.visaacceptance.com/knowledgebase/knowledgearticle/?code=KA-04113 "") Interactive REST API Reference : Use the interactive [REST API Reference](https://developer.cybersource.com/api-reference-assets/index.md "")[REST API Reference](https://developer.merchant.services.bankofamerica.com/api-reference-assets/index.md "")[REST API Reference](https://nabgateway-developer.nab.com.au/api-reference-assets/index.md "")[REST API Reference](https://developer.visaacceptance.com/api-reference-assets/index.md "") in the `Cybersource` Developer Center to create an example REST API request message. Customer Support : For support information about any service, visit the Support Center: [https://developer.merchant.services.bankofamerica.com/support/contact-us.html](https://developer.merchant.services.bankofamerica.com/support/contact-us.md "")[https://nabgateway-developer.nab.com.au/support/contact-us.html](https://nabgateway-developer.nab.com.au/support/contact-us.md "")