You can hide some account details on client websites. On the Websites page, open a site and find License Security.
Turn on This license is activated on my client(s) site(s). That hides items such as invoices and billing details on the Account tab for that site.
Where to find it after you log in to your account page:
This only hides some Account menu details. To hide account handling and branding completely, use the White label feature. White label is available on licenses for 25 sites or more.

