What is a key requirement for Mail Clerks regarding confidentiality?

Maintaining the privacy of all mail and customer information is essential for Mail Clerks as it upholds a fundamental principle of confidentiality. This requirement ensures that sensitive personal and business information is protected, fostering trust among customers who rely on mailing services. By safeguarding this information, Mail Clerks contribute to the integrity of the mailing system and adhere to legal and ethical standards that govern confidential information handling. This aspect of confidentiality is crucial not only for individual privacy but also for the overall credibility of mail services.