POSTAL AFFAIRS

Postal Affairs - S-1 Procedural Overview

Run Marine Corps postal operations per MCO 5110.4B and DoDI 4525.09 covering MPO/FPO operations, official mail management, postal officer appointment and training, registered and certified mail handling, and unit mail room accountability.

MPO FPO and Installation Operations - S-1 Procedural Page

Run Military Post Office (MPO) at land installations and Fleet Post Office (FPO) at sea-based units per DoDI 4525.09 and MCO 5110.4B with installation Postal Officer responsibilities, mail transportation coordination, and USPS interface.

Official Mail Management - S-1 Procedural Page

Manage official mail per DoDI 4525.09 and MCO 5110.4B with official mail authorization, penalty mail versus paid postage, volume tracking, and the prohibition on personal mail under penalty privileges.

Postal Officer Appointment and Training - S-1 Procedural Page

Appoint the Postal Officer in writing and run postal personnel training per MCO 5110.4B with MOS 0161 qualification, postal training pipeline, and continuing education requirements.

Registered and Certified Mail - S-1 Procedural Page

Handle registered mail and certified mail per USPS Domestic Mail Manual with accountability chain, signature requirements, and tracking through receipt at destination. Apply to OMPF Field Folder transfers, official correspondence requiring proof of delivery, and sensitive document routing.

Unit Mail Room and Accountability - S-1 Procedural Page

Operate the unit mail room (UMR) per MCO 5110.4B with inbound and outbound mail processing, accountability records, secure storage, and unit distribution coordinated through the installation Postal Officer.