- Community Currency describes currencies that are used by groups with a common bond, like members of a locality, or association.
- Complementary currency describes currencies that exists as a supplement to our conventional (national) money. “A complementary currency (…) is an agreement to use something other than legal tender (i.e. national money) as a medium of exchange, with the purpose to link unmet needs with otherwise unused resources” (Lietaer & Hallsmith 2006: 2).
- Alternative currency is often used, but in essence this term is deceitful in many cases, as many currencies are designed to be complementary, and not to concur with- or to substitute conventional currencies.
- Local currency is a Community Currency used in a locality. If this locality is larger, the word regional currency is often used.
- Private currencies emphasizes that the currency is issued by individuals, businesses or NGOs as opposed to ordinary currency issued under the authority of the government.
- Auxiliary currencies is far less applied, (see for example Douthwaite & Wagman 1999) as synonym of community currencies.
 HistoryIn the modern era, the most recognizable local currencies were company scrip issued in certain industries to pay workers, and token coins issued by some businesses to encourage consumer loyalty. In the 19th and early 20th centuries, the failures of national banks during crises often created acute demands for cash, which were met by businesses creating emergency currency. These scrips were usually issued with the intention of redemption in national currency at some later date.
A few such currencies, however, developed into monetary systems in their own right. The idea of using free banking to produce an alternative, community-level currency dates back at least as far as the German Credit Unions in the 1800s. The oldest local currencies known to be in continuous use are the WIR in Switzerland, and the Labor Banks in Japan.
Complementary currency is a hypernym to local currency, but the terms are often used as synonyms. The term "local currency" does not refer to national currency that happens to be used only in a local area.
Advocates of local currency, such as Jane Jacobs, argue that this enables an economically cool, yet depressed region to pull itself up by giving the people living there a medium of exchange they can use to exchange services and locally-produced goods. In a broader sense, this is the original purpose of all money. Local currencies also tend to operate in relatively small geographic regions and encourage recycling and reducing the amount of carbon emissions from the transportation and manufacture of goods. As a result, they are part of the economic strategy of many green and sustainable-living groups such as the Green Party of England and Wales.
Local currencies can come into being also when there is economic turmoil involving the national currency. For example, during the Argentine economic crisis of 2002, small denomination, interest-free provincial bond IOUs issued by local governments quickly took on some of the characteristics of local currencies successfully.
Opponents of this concept[who?] argue that local currency creates a barrier which can interfere with economies of scale and comparative advantage, and that in some cases they can serve, like traditional national currencies, as a means of tax evasion.
Use of local currencies to boost local economies is strongly advocated by Social Trade Organisation STRO in the Netherlands, Instrodi in Latin America, and Qoin in the Netherlands.
 Historical local currenciesThe Wörgl experiment that was conducted from July 1932 to November 1933 is a classic example of the potential efficacy of local currencies. Wörgl, a small town in Austria with 4000 inhabitants, introduced a local scrip during the Great Depression. By 1932, unemployment in Wörgl had risen to 30%. The local government had amassed debts of 1.3 million Austrian schillings (AS) against cash reserves of 40,000 AS. Local construction and civic maintenance had come to a standstill. On the initiative of the town's mayor, Michael Unterguggenberger, the local government printed 32,000 in labor certificates which carried a negative 1% monthly interest rate and could be converted into schillings at 98% of face value. An equivalent amount in schillings, deposited in the local bank as cover for the certificates in case of mass redemption, earned interest for the government. The certificates circulated so rapidly that only 12,000 were ever actually put into circulation. According to reports by the mayor and economists of the day who studied the experiment, the scrip was readily accepted by local merchants and the local population. It used the scrip to carry out 100,000 AS in public works projects involving construction and repair of roads, bridges, tanks, drainage systems, factories, and buildings. The scrip was also accepted as legal tender for payment of local taxes. In the one year the currency was in circulation, it circulated 13 times faster than the official shilling and served as a catalyst to the local economy. The heavy arrears in local tax collection declined dramatically. Local government revenue rose from 2,400 AS in 1931 to 20,400 in 1932. Unemployment was eliminated, while it remained very high throughout the rest of the country. No increase in prices was observed. Based on the dramatic success of the Wörgl experiment, several other communities introduced similar scrips.
In spite of the tangible benefits of the program, it met with stiff opposition from the regional socialist party and from the Austrian central bank, which opposed the local currency as an infringement on its powers over the currency. As a result, the program was suspended, unemployment rose, and the local economy soon degenerated to the level of other communities in the country.
Other well-documented historical examples include:
- Emperor Norton I's own currency
- Prosperity Certificate
- Wära (Germany, made illegal in October 1931)
- Bia Kut Chum, issued in 2000 by a Thai community, since replaced by a barter coupon called Boon Kut Chum.
 TheoryLocal currency is based on a local form of monetarism and mercantilism: it establishes an internal trade barrier, as the local currency cannot be used externally, and allows the area to have a different (presumably lower) interest rate than the national currency's — in the Wörgl experiment, a negative interest rate, known as demurrage. Advocacy and criticism of local currencies is based partly on general attitudes towards monetarism and mercantilism, and partly on opinions of the desirability of having internal variations in currency and trade.
Advocates[who?] of local currency in effect argue that, in certain circumstances, an entire country is not an optimum currency area, and that various regions should have different currencies. Compare with the Eurozone in Europe.
 BenefitsThe Wörgl experiment dramatically illustrates some of the common characteristics and major benefits of local currencies.
- Local currencies tend to circulate much more rapidly than national currencies. The same amount of currency in circulation is employed more times and results in far greater overall economic activity. It produces greater benefit per unit. The higher velocity of money is a result of the negative interest rate which encourages people to spend the money more quickly.
- Local currencies enable the community to more fully utilize its existing productive resources, especially unemployed labor, which has a catalytic effect on the rest of the local economy. They are based on the premise that the community is not fully utilizing its productive capacities, because of a lack of local purchasing power. The alternative currency is utilized to increase demand, resulting in a greater exploitation of productive resources. So long as the local economy is functioning at less than full capacity, the introduction of local currency need not be inflationary, even when it results in a significant increase in total money supply and total economic activity.
- Since local currencies are only accepted within the community, their usage encourages the purchase of locally-produced and locally-available goods and services. Thus, for any given level of economic activity, more of the benefit accrues to the local community and less drains out to other parts of the country or the world. For instance, construction work undertaken with local currencies employs local labor and utilizes as far as possible local materials. The enhanced local effect becomes an incentive for the local population to accept and utilize the scrips.
- Some forms of complementary currency can promote fuller utilization of resources over a much wider geographic area and help bridge the barriers imposed by distance. The Fureai kippu system in Japan issues credits in exchange for assistance to senior citizens. Family members living far from their parents can earn credits by offering assistance to the elderly in their local community. The credits can then be transferred to their parents and redeemed by them for local assistance. Airline frequent flyer miles are a form of complementary currency that promotes customer-loyalty in exchange for free travel. The airlines offer most of the coupons for seats on less heavily sold flights where some seats normally go empty, thus providing a benefit to customers at relatively low cost to the airline.
- While most of these currencies are restricted to a small geographic area or a country, through the Internet electronic forms of complementary currency can be used to stimulate transactions on a global basis. In China, Tencent's QQ coins are a virtual form of currency that has gained wide circulation. QQ coins can be purchased for Renminbi and used to purchase virtual products and services such as ringtones and on-line video game time. They are also obtainable through on-line exchange for goods and services at about twice the Renminbi price, by which additional 'money' is being directly created. Though virtual currencies are not 'local' in the tradition sense, they do cater to the specific needs of a particular community, a virtual community. Once in circulation, they add to the total effective purchasing power of the on-line population as in the case of local currencies. The Chinese government has begun to tax the coins as they are exchanged from virtual currency to actual hard currency.
 Difficulties and criticismsLocal currencies and the Transition Towns movement in the UK have received criticism for a failure to address the needs of the wider population, especially lower socio-economic groups. Such local currency initiatives have been more widely criticized in light of limited success stimulating new spending in local economies and as an unrealistic strategy to reduce carbon emissions. Successful Local Currencies such as the Wörgl experiment attract hostility from the Central Governments, as they reduce the bureaucracy's control over an important power centre.
 Modern local currencies
Since 2002 there has been an upsurge in local currency experiments particularly payment voucher-based systems that are exchangeable with the national currency. Such currencies aim to raise the resilience of local economies by encouraging re-localisation of buying and food production. The drive for this change has arisen from a range of community-based initiatives and social movements. The Transition Towns movement originating in the UK has utilised local currencies for re-localisation in the face of energy descent from peak oil and climate change. Other drives include movements against Clone town and Big-box trends.
Previously, one of the most prominent systems was LETS, local exchange trading system, a trading network supported by its own internal currency. Originally started in Vancouver, Canada, there are presently more than 30 LETS systems operating in Canada and over 400 in the United Kingdom. Australia, France, New Zealand, and Switzerland have similar systems. Time Dollars, Ithaca Hours, and PEN exchange are among the most successful systems in the USA.
- Worldwide Database of Complementary Currency Systems
- Gallery of Images and Samples of Notes from Complementary Currency Systems
- short description of historical and current Local Currencies
- South America
- North America
- Regional Exchange System «Time Banking» (ROCSystem)
- United Kingdom
- Billex (credit system based on gold bills, Tomsk)
- Ven by Hub Culture
- Flash Cash
- Green dollar
- Interdependent Occupational Unit
- RGT - Red Global del Trueque
- ROCS - Robust Complementary Community Currency System
- RERS - Réseaux d'Echange Réciproque de Savoirs
- Salta Creditos
- Systèmes d’Echanges Communitares
- Thay Gerh
- Tianguis Tlaloc
 See also
- Alternative currency
- Fiscal localism
- Buy local
- Informal sector (of the economy)
- Local exchange trading system
- Complementary currency
- Collaborative finance
- List of economics topics
- Private currency
- Time-based currency
- Time Banking
- Ven (currency)
- Wörgl Experiment with Depreciating Money
- McKeever Institute of Economic Policy Analysis: There Are Alternatives Project
- A Boon to Kut Chum archive
- Lietaer, Bernard, The Future of Money, Century, 2002.
- China Taxes Online Game Players KerryOnWorld, December 7, 2008
- Jamie Doward and Naomi Loomes (2008-08-17). "Lewes, the proud town that is printing its own money". London: Guardian. http://www.guardian.co.uk/business/2008/aug/17/currencies.britishidentity. Retrieved 2010-08-14.
- The Undercover Economist on Local Currency
- A critique of the Lewes Pound and of local currencies more generally
- "Salt Spring Dollars". Salt Spring Island Monetary Foundation. http://www.saltspringdollars.com/. Retrieved 2011-04-27.
- "Measures Aim To Tackle Problem Of Empty Shops". Publicnet.co.uk. 2009-04-15. http://www.publicnet.co.uk/news/2009/04/15/measures-aim-to-tackle-problem-of-empty-shops/. Retrieved 2010-08-14.
- Clone Town Britain survey: results reveals national identity crisis The new economics foundation, 6 June 2005
- "No money? Then make your own". BBC News. 2009-09-17. http://news.bbc.co.uk/1/hi/magazine/8245276.stm. Retrieved 2010-05-11.
- VENTSPILS VENTS
- Community Forge Provider of open source software and solutions for 500+ community currencies
- Baroon Dollar An Australian local currency system.
- Barter and Trade Software Web service for independent trade networks.
- Kroonos.com Online social networking and time bank
- E. F. Schumacher Society large collection of information on local economies including local currencies
- History of Barter and Local Currencies large collection of information about the history of barter and local currencies
- Calderdale Green Currency 2000-2003
- Regional currencies in Germany - local competition for the euro? Deutsche Bundesbank (ed.)
- open money
- Open Transactions open source software
- Community Exchange System (CES) global complementary currency system
- Community Currency Resources
- Community Currency
- ccPedia (a wiki of related topics)
- Complementary Community Currency Systems
- Alternative Money Systems
- Local Currency Directory for USA & Canada
- ccSyndicator Collaborative IT Committee for Complementary Currencies
- Collaborative Finance and Complementary Currencies
- Social Trade Organization
- Margrit Kennedy
- Network of German local currencies
- Online Laboratory on Complementary Currencies JAPAN
- Parallel Currency Systems in Asia
- Complementary Currency Resource Center
- Ithaca Hours An example of a local currency system functioning in the US.
- Ithaca Hours HOUR founder's site consulting with new currencies.
- Bank of International Art Money A global alternative money based on currency created by artists.
- REDI-the Regional Economic Development Initiative A local currency system being developed for Colorado.
- Infography about Community Currencies
- In We We Trust: The Prospect Of Local Currencies
- Cyclos, Open Source Complementary Currency Software
- Cclite, Open Source Currency Software in Perl/Mysql
- Community Currency Magazine
- The Plenty A local currency revitalized by the publication of Small is Possible by Lyle Estill
- From Stalwart To Skeptic, Germany Rethinks EU Role on the development of microcurrencies in Germany.
- Fuzzy Local Currency Based on Social Network Analysis for Promoting Community Businesses.