A method may include receiving a removal request from a first user account, the removal request configured to request removal of a control relationship between the first user account and a device. A method may further include determining whether the first user account is an owner account of the device or a share account of the device. A method may further include retrieving a first share account corresponding to the device, the first share account being an account having permission to control the device, wherein the permission to control the device has been shared with the first share account by a user account different from the first share account. A method may further include removing a full control relationship between the owner account and the device. A method may further include removing a limited control relationship between the first share account and the device.