Which organization sets and enforces rules for ACH payments in the USA?

The organization that sets and enforces rules for ACH (Automated Clearing House) payments in the USA is Nacha. This nonprofit organization plays a crucial role in the development, administration, and governance of electronic payments through the ACH network. Nacha establishes the operating rules and standards that all participants must follow to ensure the safe and efficient processing of ACH transactions.

Nacha works to enhance the ACH network's reliability and security, ultimately facilitating various payment systems involving both consumer and business transactions. The rules set by Nacha are critical for ensuring compliance with federal laws and regulations as well.

While the Federal Reserve does play a role in the processing of ACH payments, it does not set the operational rules; instead, it acts as a clearinghouse within the system. The Electronic Payments Association, although related to the industry, is not the regulatory authority that enforces ACH rules. The Department of Treasury handles financial management for the federal government, but it does not specifically govern the rules for ACH transactions. Thus, Nacha stands out as the authoritative body in this context, making it the correct answer.