Concerns about identity theft and other forms of mail fraud have prompted many home owners to install secured mail boxes. Businesses and apartment complexes have utilized cbu mailboxes for their tenants for a long time. They provide security for the tenants and convenience for the mailman. All in all, a pretty good arrangement. Now, this security is also available for individual homes. You can stop worrying about having someone rummaging through your mailbox while you're away from home.