Peterborough LETS Exchange Community Association of Peterborough, ONPeterborough Local Economic System (LETS): local non-profit barter systemBecome a Peterborough Local Economic System (LETS) memberThe Peterborough Local Economic System (LETS) is a local barter system where goods and services are traded for green dollars. Green dollars are then used to buy goods or services. The Green Dollar is the official currency of the LETS Exchange. A Green Dollar is equal in value to a Canadian dollar, but it only works within the system. You earn Green Dollars by providing goods or services to another LETS member. You can then use them as a credit that is accepted by all members of the system. There are no printed Green Dollars. Accounts are kept using a computerized accounting program. Members advertise the skills, services and goods they are offering to trade in the LETS directory and newsletters. When you make the purchase, you phone the transaction in to the 24-hour LETS Hotline, and staff do the bookkeeping. more... See more text