Hey @9110fe86, as mentioned earlier, Google does not have access to the content of notifications sent through FCM. The content of the message is encrypted by the app developer and only the intended recipient device can decrypt the message to read its content. However, if the developer does not use end-to-end encryption for notification content, then it is possible for someone at Google to see the contents. The device token used in FCM is unique to each app installation on the device and is not tied to any hardware identifier, so your device identity and user data remain private.