Mexico Elmhurst Philatelic Society International, better known as MEPSI, is an organization devoted to the study of all aspects of the postal history

Postal history

Postal history is the study of postal systems and how they operate and, or, the study of postage stamps and covers and associated material illustrating historical episodes of postal systems...

 of Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 since 1952. MEPSI became a non-profit corporation under Illinois

Illinois

Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

 statues on February 6, 1957 and is a tax exempt educational organization under Internal Revenue Code

Internal Revenue Code

The Internal Revenue Code is the domestic portion of Federal statutory tax law in the United States, published in various volumes of the United States Statutes at Large, and separately as Title 26 of the United States Code...

  section 501(c)(3).

MEPSI is American Philatelic Society

American Philatelic Society

The American Philatelic Society is the largest nonprofit stamp collecting and organization of philately in the world, with almost 44,000 members from 110 countries...

 affiliate #43.

MEPSI has the largest following in Mexico and the United States. However, the ca. 650 members are spread over more than 27 countries.

Society services

MEPSI offers the following services to its members:

• Mexicana, an award winning quarterly journal
  Magazine
  Magazines, periodicals, glossies or serials are publications, generally published on a regular schedule, containing a variety of articles. They are generally financed by advertising, by a purchase price, by pre-paid magazine subscriptions, or all three...
  
  .
• A reference library
  Library
  In a traditional sense, a library is a large collection of books, and can refer to the place in which the collection is housed. Today, the term can refer to any collection, including digital sources, resources, and services...
  
  
• Expertization
• Publication of literature related to the philately
  Philately
  Philately is the study of stamps and postal history and other related items. Philately involves more than just stamp collecting, which does not necessarily involve the study of stamps. It is possible to be a philatelist without owning any stamps...
  
   of Mexico.
• Stamp auctions