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Definition of 'National Automated Clearinghouse Association - NACHA '
A non-profit membership association charged with overseeing the Automated Clearing House (ACH) system, which operates the largest electronic payment network in the world.
Most of NACHA's 10,000+ members are depositary institutions and regional payment associations. Through its supervisory and rule-making functions, NACHA provides the legal foundation for electronic payment systems to operate effectively, while working to update technologies and create new payment systems.
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