What unit processes anonymous mail?

The unit that processes anonymous mail is referred to as the Anonymous Mail Unit. This specialized unit is designed to handle various types of anonymous correspondence, ensuring that the privacy of senders is maintained while still adhering to postal regulations. The unit's focus on anonymity sets it apart from other facilities that may deal with a broader range of postal items but do not specifically cater to anonymous correspondence.

In contrast, options such as an Anonymous Mail Center might sound plausible but do not represent the established terminology used by USPS. Similarly, the Postal Verification Institute and the Public Mail Facility handle different aspects of postal services and mail processing but are not dedicated to the specific handling of anonymous mail. Thus, the Anonymous Mail Unit is the correct designation for the unit responsible for this function.