Nacha is an abbreviation for the National Automated Clearing House Association, which is a payments network entity responsible for making sure consumers and businesses are fully aware of how ACH payment processing works and establishing rules and regulations for the governance of ACH payment transactions in the U.S. between bank or credit union accounts.  Nacha strives to ensure everyone is provided with educational resources and tools that not only show them how ACH payments work, but that enhance the safety and speed up the processing of the payments.