Editing Notgeld (section)

===Collector series===
[[File:Mainz 50 Pfg 1921.jpg|thumb|50-{{lang|de|pfennig}} {{lang|de|Notgeld}} issued by [[Mainz]], 1921]]
Though the production of {{lang|de|Notgeld}} was initially amateurish, with many set by typewriter or even handwritten, collectors soon appeared on the scene to take hold of the expired 1914 stock. With the next wave of issues in the latter half of the war, {{lang|de|Notgeld}} production was handled by professional printers. These issues incorporated pleasing designs, and a new reason for hoarding came into being.

As the issuing bodies realized this [[demand]], they began to issue notes in 1920, well after their economic necessity had ended. They may have been motivated by the success of Austrian collector {{lang|de|Notgeld}} earlier in the year (see below). Notes were issued predominantly in 1921 and were usually extremely colorful. These depicted many subjects, such as local buildings, local scenery and folklore, as well as politics. Many were released in series of 6, 8, or more notes of the same denomination, and tell a short story, with often whimsical illustrations. Often, they were sold to collectors in special envelope packets printed with a description of the series.

Keller published information on releases in his magazine {{lang|de|Das Notgeld}}. Often, he used his publication to criticize issuers for charging collectors more money for the series than their face value.

These collector-only sets, which were never intended to circulate, were known as {{lang|de|Serienscheine}} (pieces issued as a part of a series). Quite often, the validity period of the note had already expired when the {{lang|de|Notgeld}} was issued. As such, they are usually found in uncirculated condition, and are most favored by collectors all over the world.