At what facility is Anonymous Mail separated?

Anonymous Mail is specifically handled and separated at the AMU, which stands for Anonymous Mail Unit. This facility is designed to ensure the confidentiality and privacy of certain types of mail that do not display sender information. The AMU is equipped to manage the unique requirements associated with processing anonymous mail, allowing for the necessary safeguards while maintaining efficiency in mail processing.

In contrast, other facilities such as the PMU, RMU, and CMU serve different purposes within the postal system. The PMU typically handles priority mail, the RMU is focused on retail and money orders, and the CMU is responsible for commercial mailings and more standard processing tasks. Therefore, the AMU is the correct facility for the separation of Anonymous Mail, as it specializes in handling mail that requires such privacy measures.