Specimen banknote

In addition, specimen banknotes are sold in some countries to collectors (often in special commemorative folders or albums).

They have also been distributed by banknote printers (such as the American Bank Note Company) as examples of their craftsmanship.

Occasionally, specimen banknotes are distributed as gifts to dignitaries or to employees of central banks, often in special presentation albums.

Specimen banknotes vary in scarcity; in the case of the United States and many other countries, specimen banknotes remain the property of the central bank and when shared with another entity, are supposed to be kept secure and returned on demand.

[1] Variants of specimen notes, as well as other non-legal-tender images of banknotes include:

A specimen banknote of the Anglo-Egyptian Bank in Malta .
Trial design for a 1 rupee banknote. Government of India, 1940. On display at the British Museum in London