Amcrest was different. When you got an Amcrest camera, the camera has an ID. That ID gets associated with your cloud account. The camera pushes video to the cloud. The Amcrest Cloud client (or notifications) would simply ask the cloud server for a particular camera ID (oversimplified here) that has pushed video to the cloud.
The problem was: returning the camera, or erasing the camera, does not change this piece of ownership configuration because it was stored on the Amcrest Cloud servers. Based on the Amcrest response, it looks like the client looks for cameras using not just the camera ID but the account name as well (probably also oversimplified), but the point is that combination will be unique to a camera owner even if the camera is sold or given away. So it's fixed.
visit: custom essay writing service