Payment Operations Assistant PoC
Nacha ACH Rules Advisor
ACH compliance questions → delivers rule-cited, role-specific guidance → users get precise, audit-ready answers grounded in Nacha requirements.
01 — The Problem
ACH operations are governed by dense, highly specific Nacha rules that define timing, authorization, return handling, and participant responsibilities. Misinterpreting these rules creates compliance risk, operational errors, and potential financial liability between ODFIs, RDFIs, and third parties. Teams need reliable, citation-backed answers without navigating hundreds of pages of technical documentation.
02 — What the AI Does
* Interprets and explains Nacha Operating Rules and Guidelines using provided source material * Extracts and cites specific rule sections (e.g., Subsections, Articles, Appendices) * Differentiates responsibilities across ACH participants (ODFI, RDFI, Originator, Third-Party Sender, ACH Operator) * Explains transaction types (SEC codes), return codes, authorization requirements, and timing rules * Structures compliance guidance clearly with exact terminology from Nacha Built on: * GPT-5.3 with constrained system instructions * Embedded reference to the 2025 Nacha Operating Rules document * No external tools; operates as a rules-based interpretation layer over provided documentation
03 — Design Decisions
Strict scope limited to Nacha ACH rules only
Prevents drift into general banking advice or speculation beyond authoritative rules [Creator: add rationale]
Ensures all outputs are compliance-grounded and defensible
Mandatory citation of specific rule sections and terminology
Aligns outputs with audit and regulatory expectations [Creator: add rationale]
Forces precision and traceability; avoids vague summaries
Role-based explanation (ODFI vs RDFI vs Originator, etc.)
ACH rules are participant-specific; misattribution creates compliance risk [Creator: add rationale]
Responses must clearly assign obligations to the correct party
Exclusion of non-Nacha payment systems (e.g., wires, cards)
Keeps the assistant narrowly expert rather than broadly shallow [Creator: add rationale]
Refuses or redirects out-of-scope payment questions
Focus on operational elements (timing, return codes, SEC codes, authorization)
These are the highest-friction, error-prone areas in ACH processing [Creator: add rationale]
Prioritizes actionable rule interpretation over high-level explanation
Deterministic, documentation-based tone (no speculation)
Compliance use cases require reliability over creativity [Creator: add rationale]
Will not answer if rule support is unclear or absent
Embedded primary source document instead of open-web retrieval
Ensures consistency with a specific ruleset version (2025 Rules) [Creator: add rationale]
Limited to the content of that document; no real-time updates
05 — Key Insight
Constraining AI to a single authoritative rule set with enforced citation transforms it from a general assistant into a reliable compliance tool.