What the Column Headings Mean

Postal Service Identification Number (PSIN)

The Postal Service Identification Number (PSIN) is the document’s identifier. Each PSIN includes a prefix that indicates what type of directive it is, as noted in the following table:

 

Prefix

Directive Type

HBK

Handbook

HC

Headquarters Circular

KIT

Kit

LAB

Label

MAN

Manual

MI

Management Instruction

MOP

Memorandum of Policy

NOT

Notice

POS

Poster

PS

Form

PUB

Publication

SGN

Sign

TAG

Tag

Following the prefix, the PSIN also includes a unique numerical code (e.g., PUB 223) or, for handbooks and management instructions, a unique alpha-numeric code (e.g., HBK AS-353 or MI AS-270-2000-5). The two-letter portion of the alpha-numeric code identifies the Postal Service policy manual or topic/organization to which the document relates, as noted in the table below:

 

Two-Letter Code

Manual or Topic/Organization

AS

Administrative Support Manual

DM

Domestic Mail Manual

EL

Employee and Labor Relations Manual

FM

Finance

IM

International Mail Manual

IS

Inspection Service Manual

PO

Postal Operations Manual

A document that belongs to another government agency is identified by that agency’s prefix, as noted in the following table:

 

Prefix

Government Agency

ATF

Bureau of Alcohol, Tobacco and Firearms

CA

Department of Labor

DD

Department of Defense

FD

Federal Bureau of Investigation

FE

Office of Personnel Management

GSA

General Services Administration

HCFA

Office of Personnel Management

IRS

Internal Revenue Service

OF/OFI

Optional (U.S.) Government Form

OMB

Office of Management and Budget

SF

Standard (U.S.) Government Form

SSS

Selective Service System

TD/TFS/TUS

Department of the Treasury

TSP

Thrift Savings Plan

W

Internal Revenue Service

WHD

Wage and Hour Division, U.S. Department of Labor

Note: The PSIN or government prefix and number must be used when ordering a document.