Complementary currency is a type of currency that exists alongside a country's official currency. It is designed to encourage local trade and support community development. These currencies can help stimulate economic activity by providing an alternative means of exchange, often focusing on specific local needs or values. Examples of complementary currencies include the Bristol Pound in the UK and the Chiemgauer in Germany. These currencies are typically used within a defined area or community, promoting local businesses and fostering a sense of community among participants. They can also help address social issues by supporting sustainable practices and enhancing economic resilience.