INTRATHEATER MAILMail addressed within a theater of operation. Example: Mail from FPO
AE 09XXX to FPO AE 09XXX.
INVESTIGATING OFFICERA commissioned officer, warrant officer, or senior enlisted person
(E-7 through E-9) appointed by a commander to review and conduct investigations, establish pecuniary
liability, and report findings and recommendations within the appointing order.
IRREGULARITIES (CARRIER)Failure by serving carriers to comply with performance standards
established by the U.S. Postal Service (USPS).
KILLER BARSThe parallel lines that extend to the right of the circular postmark for canceling the
postage stamp so that it cannot be reused.
The lines are part of most standard machine and
MAIL ADDRESS ONLY (MAO)An APO or FPO number serving as a routing indicator for mail
separation and transportation routing purposes only.
MAIL CLERKAn individual designated by proper authority to perform mail duties in association
with the operation of a unit mailroom (UMR) or a postal service center (PSC) that is not considered a
section of a military post office (MPO).
MAIL CONTROL ACTIVITY (MCA)A civilian or military facility handling mail; such as, an aerial
mail terminal (AMT), airport mail facility (AMF), bulk mail center (BMC), fleet mail center (FMC),
military mail terminal (MMT), or postal concentration center (PCC).
MAIL COVERA record of information on the outside (cover) of any mailpiece. It is kept to locate a
fugitive, protect national security, or obtain evidence of a crime punishable by a prison term exceeding
1 year. This record is one of the few ways information on mail may be disclosed outside the USPS, and
its use is lawful only if authorized by postal regulations.
MAIL DIRECTORYAn alphabetical listing by name of individuals served, due to arrive, or departed
within the past year. Inside the United States, mail directories are maintained by military units to
process undeliverable military mail for personnel served in transit or on temporary duty status. Outside
the United States, mail directories are maintained by units, military post offices (MPOs), and central
postal directories to process undeliverable military mail for personnel served.
MAIL DIRECTORY SERVICEA search of mail directory files for the name of the addressee of
undeliverable mail and endorsing each piece to show a forwarding address or reason for nondelivery.
MAIL MAKEUPTo separate and group mail for dispatch.
MAIL MANIFESTA document transferring mail to a postal activity or into a mail transportation
system. For example: DD Form 1384, Transportation Control and Movement Document.
MAIL ORDERLYAn individual designated by proper authority to perform mail-handling duties
that are limited to collection and delivery of non-accountable mail from mailrooms and post offices.
MAIL PROCESSINGCanceling and sorting mail so it can be sent from the post office. All
subfunctions that accommodate these two basic steps, including in and/or out movement, are part of the
MAILROOMA facility or area operated by the Department of Defense (DOD) or civilian agency for
the receipt and delivery of mail for military units or other authorized personnel and agencies.
MAIL ROUTING AUTHORITYMail routing message or individual requesting mail movement of
any given unit.
MAIL ROUTING GUIDEGuide published by Joint Military Postal Activity - Atlantic (JMPA-A) or
Joint Military Postal Activity - Pacific (JMPA-P) that lists all U.S. Navy (USN) ships and activities
operating within its area of responsibility.