IMM Revision: Modifying References to Montenegro

Effective April 6, 2009, the Postal Service™ is revising Mailing Standards of the United States Postal Service, International Mail Manual (IMM®) to modify all references to the Republic of Montenegro by omitting the words “Republic of.”

The country of Montenegro formally made this request to the Universal Postal Union (UPU) via International Bureau Circular number 51 on February 23, 2009.

We will incorporate these revisions into the next printed version of the IMM and into the monthly update of the online IMM, which is available via Postal Explorer® at