Exonumia are numismatic items (such as tokens

Token coin

In the study of numismatics, tokens are coin-like objects used instead of coins. The field of tokens is part of exonumia. Tokens are used in place of coins and either have a denomination shown or implied by size, color or shape...

, medal

Medal

A medal, or medallion, is generally a circular object that has been sculpted, molded, cast, struck, stamped, or some way rendered with an insignia, portrait, or other artistic rendering. A medal may be awarded to a person or organization as a form of recognition for athletic, military, scientific,...

s, or scrip) other than coins and paper money. This includes "Good For" tokens, badges, counterstamped coins, elongated coin

Elongated coin

Elongated coins are coins that have been elongated and embossed with a new design with the purpose of creating a commemorative or souvenir token. The collecting of elongated coins is a branch of numismatics...

s, encased coins, souvenir medallions, tags, wooden nickel

Wooden nickel

A wooden nickel, in the United States, is a wood token coin, which are usually issued by a merchant or bank as a promotion, sometimes redeemable for a specific item such as a drink. Wooden nickels were most commonly issued in the U.S. in the 1930s, after the Great Depression...

s and other similar items. It is related to numismatics

Numismatics

Numismatics is the study or collection of currency, including coins, tokens, paper money, and related objects. While numismatists are often characterized as students or collectors of coins, the discipline also includes the broader study of money and other payment media used to resolve debts and the...

 (concerned with coins which have been legal tender

Legal tender

Legal tender is a medium of payment allowed by law or recognized by a legal system to be valid for meeting a financial obligation. Paper currency is a common form of legal tender in many countries....

), and many coin collectors are also exonumists.

Besides the above strict definition, others extend it to include non-coins which may or may not be legal tenders such as cheques, credit card

Credit card

A credit card is a small plastic card issued to users as a system of payment. It allows its holder to buy goods and services based on the holder's promise to pay for these goods and services...

s and similar paper.