Early US postcards

The first American postcard was developed in 1873 by the Morgan Envelope Factory of Springfield, Massachusetts. Later in 1873, Post Master John Creswell introduced the first pre-stamped "penny postcards". These first postcards depicted Interstate Industrial Exposition that took place in Chicago. Postcards were made because people were looking for an easier way to send quick notes. The first postcard to be printed as a souvenir in the United States was created in 1893 to advertise the World's Columbian Exposition in Chicago.

The Post Office was the only establishment allowed to print postcards, and it held its monopoly until May 19, 1898, when Congress passed the Private Mailing Card Act which allowed private publishers and printers to produce postcards. Initially, the United States government prohibited private companies from calling their cards "postcards", so they were known as "souvenir cards". These cards had to be labeled "Private Mailing Cards". This prohibition was rescinded on December 24, 1901, when private companies could use the word "postcard". Postcards were not allowed to have a divided back and correspondents could only write on the front of the postcard. This was known as the "undivided back" era of postcards. On March 1, 1907 the Post Office allowed private citizens to write on the address side of a postcard. It was on this date that postcards were allowed to have a "divided back".