Third-Party Senders & The ACH Network is designed primarily for use by ODFIs and those Third-Party Service Providers that act in the specific role of Third-Party Senders. This publication provides a review of the variations in legal requirements and processing obligations relating to the origination of ACH entries when a Third-Party Service Provider, acting as a Third-Party Sender, is involved in the origination of transactions through the ACH Network. This edition reflects the latest NACHA Operating Rules changes, offers real-world examples of ThirdParty Sender relationships, and includes sound business practices, risk management topics and a checklist of issues to be addressed by ODFIs, Originators, and Third-Party Senders in processing agreements.