You can check whether the machine is deleted from Google Cloud Print in one of the following three ways.
Google Web site (https://accounts.google.com)
Check that the machine is not displayed.
For the IP address of the machine, refer to "Setting an IP Address from the Operator Panel on This Machine".
The factory default user name and password for [Administrator Login] are "root" and "aaaaaa", respectively.
If you delete the registration information by following the procedure in "Deleting the Registered Information" with the machine not being connected to a network, the registered machine may remain on the Google Cloud Print administrator screen (https://www.google.com/cloudprint). In such a case, delete the machine on the Google Cloud Print administrator screen.
If you deleted the registered machine on the Google Cloud Print administrator screen (https://www.google.com/cloudprint), the registration information remains in the machine. In such a case, delete the registration information from the operator panel of the machine.