What classes of mail are eligible for certified service?

Certified mail is a premium service offered by USPS that provides the sender with proof of mailing and delivery. It is specifically designed to add extra security and assurance for important documents and items. The classes of mail that are eligible for certified service are typically those that require tracking or have legal significance, such as Priority Mail and First-Class Mail.

First-Class Mail is often used for personal correspondence, bills, and documents requiring timely delivery, making it suitable for certified service. Priority Mail, known for its expedited delivery times, also benefits from certified service by providing additional assurance to the sender regarding the delivery of valuable or important items.

The other mail classes mentioned are not eligible for certified service. Standard and Bulk mail, as well as Ground and Media Mail, generally apply to mass mailings or items that do not necessitate the same level of tracking and delivery confirmation as Priority Mail or First-Class Mail. Thus, the eligibility of certified service applies specifically to the classes that ensure more urgent and critical handling.