Most of us have all our Apple devices synced through iCloud. It is not a bad idea to login to your iCloud account to confirm which devices are listed. A while back I did just that and discovered I still had an old iMac listed there that I had given to another person. If you have old devices in your iCloud account or if a device is lost or stolen, you can remove it without having the device present. This article describes several ways to do that.