Complementary currency - Financial definition
Concise definition of the term complementary currency
A complementary currency is a currency or other medium of exchange that is supplementing or complementing a national currency.
Comprehensive definition of the term complementary currency
Examples for complementary currencies would be private currencies issued by businesses or organizations, mutual credit or barter.
Complementary currencies are usually not legal tender and their use is based on agreement between the parties exchanging the currency.