Your packages are listed on your invoice with the domain of your first website in that package.
Would you like to change the name on the invoice? That is possible.
Go to the Savvii Control Panel (https://admin.savvii.com), navigate to your package and click on the 'pencil' icon. Now you can enter your own name for this package. The package type and billing period is always printed on your invoice.
It can take up to 30 minutes before your changes made at the Control Panel are visible at https://billing.savvii.com.