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eBay is making changes to add Server Name Indication (SNI) support to our production Platform Notifications server. Please refer to the KB Article and implement and test the changes in Sandbox: https://ebaydts.com/eBayKBDetails?KBid=5095 **What is the change?** eBay is formatting their notifications to support Server Name Indication (SNI). SNI is an extension to the Transport Layer Security (TLS) protocol. This change will make Platform Notifications compatible with the majority of secure server configurations used to receive secure notifications. This change has already been made for the sandbox environment in October 2017. **When will this change happen?** Dates will be announced soon. **How does this change affect you?** If you are subscribed to Platform Notifications with an HTTPS address for your listener and you have tested your listener server in the sandbox since October 2017, then your server will work properly in production. If you are not sure if you are ready for this change, please read on to see how this coming change affects you. **Subscribed to Platform Notifications with an HTTPS address** You must test your server in sandbox to ensure you are able to receive notifications. If during testing, you are unable to receive notifications, please read Not receiving platform notifications over HTTPS at https://ebaydts.com/eBayKBDetails?KBid=5094 in the eBay Developers Program knowledge base. **Subscribed to Platform Notifications with an HTTP address** The change for SNI support will not impact you. If you plan to move to an HTTPS listener, please test it with our sandbox environment first. **Subscribed to Platform Notifications with an email address** The change for SNI support will not impact you.