New Mexico: AI Ethics Guidance for Law Firms

Bottom line for a 5-50 attorney New Mexico firm: The State Bar of New Mexico’s Formal Ethics Advisory Opinion 2024-004 (Sept. 24, 2024) permits responsible AI use but attaches substantive conditions on competence, confidentiality, conflicts screening, billing, supervision, and candor. The U.S. District Court for the District of New Mexico has a posted standing order requiring AI disclosure and accuracy certification. D.N.M. judges have already imposed hallucination sanctions. Audit every AI tool for data sharing and training-data practices before client information is input.

Start with: a written AI use policy, a D.N.M. and judge-specific filing workflow, and a vendor due-diligence record for each AI tool in use.

State Bar of New Mexico Ethics Advisory Opinion 2024-004

Citation: State Bar of New Mexico Ethics Advisory Committee, Formal Ethics Advisory Opinion 2024-004, “Using Generative Artificial Intelligence in the Practice of Law” (Sept. 24, 2024). Primary source: PDF. Ethics opinion index.

Status: Formal advisory opinion. Not binding as a court order, but the Committee’s authoritative interpretation of the New Mexico Rules of Professional Conduct.

What it requires

• A lawyer must understand a tool’s training, data access, input handling, and known limitations before using it in practice (Rule 16-101). Hallucination risk is among those limitations.
• Before submission to a court, AI-generated research, citations, and analysis must be independently verified through traditional legal databases (Rules 16-103, 16-303). The duty of diligence cannot be delegated to the tool.
• Lawyers must not input confidential client information into a tool that shares inputs with third parties or retains inputs for model training (Rule 16-106). Tools lacking adequate security are equally prohibited. Information that could lead to discovery of client identity falls under the same restriction. At minimum, anonymize and remove identifying details before use.
• Before relying on AI output, a lawyer must verify that no conflict exists. This applies where the tool lacks safeguards to screen for prior client information (Rules 16-107, 16-108). Firms must maintain internal procedures to screen AI outputs for conflict risk.
• Lawyers must develop firm-level AI policies and procedures before using AI in client representations. All attorneys and staff must be trained on those policies. AI-assisted work must be supervised (Rules 16-501, 16-503).
• A lawyer may charge only for time and labor actually incurred and must pass AI efficiency gains to the client. General-purpose AI subscriptions must be treated as overhead, not billed as disbursements (Rule 16-105).
• AI-generated authority must be verified for accuracy before submission. A hallucinated citation violates the duty of candor (Rule 16-303).

What it recommends

• Conduct documented vendor due diligence covering third-party data sharing, training-data retention, and security before approving a tool.
• Recognize permitted uses identified by the Committee: initial drafting of documents and routine correspondence, complex contract drafting assistance, witness examination preparation, discovery review, and case summary generation.

Notable gaps

Proactive disclosure of AI use in court filings is not required by the opinion. Disclosure is left to the court-by-court rules below. The authoritative opinion number is 2024-004, confirmed against the title page of the primary-source PDF, which is captioned “FORMAL OPINION: 2024-004.”

What federal courts in New Mexico require for AI use in filings

U.S. District Court for the District of New Mexico, Standing Order Regarding Use of Generative AI

Primary source PDF. The order is captioned “IN RE: All Cases Assigned to District Judge Margaret I. Strickland” and applies only to cases on Judge Strickland’s docket, not the District of New Mexico as a whole. When generative AI is used in preparing a filing, the party or attorney must disclose AI use and identify the specific tool. The filer must also certify that AI-generated content has been checked for accuracy, including all citations and legal authority. Both represented parties and self-represented litigants are covered. Grounding lies in Rule 11(b) of the Federal Rules of Civil Procedure. Other D.N.M. judges have not posted equivalent standing orders; check the assigned judge’s chambers procedures for each filing. See the tracker entries for the Strickland standing order and the district-wide Chief Judge Gonzales bulletin.

What New Mexico state courts require for AI use in filings

A statewide AI policy for the state court system is in development at the New Mexico Supreme Court. No statewide attorney AI rule has issued as of the verification date below. Monitor supremecourt.nmcourts.gov for adoption.

State District Court Judge John P. Sugg (Carrizozo) has issued an individual order. Attorneys and self-represented litigants who use generative AI to draft, edit, or modify any pleading, motion, or other written document must disclose AI use at the top of the filing. They must also certify that AI-generated language was verified using traditional legal databases or by a human being. The order applies only to matters before Judge Sugg; firms should confirm whether other state-court judges have issued similar orders.

The New Mexico Supreme Court has separately amended UJI 13-110 NMRA, “Use of AI by Jurors,” via Order No. S-1-RCR-2024-00081 (approved 2025-10-31, effective 2025-12-31). The amendment governs juror conduct, not attorney conduct, but is relevant to voir dire and jury-instruction practice at trial.

Has anyone been sanctioned for AI use in New Mexico?

Magistrate Judge Damian Martinez (D.N.M.): Sanctioned an attorney $1,500 after discovering six nonexistent case citations in a pleading. The citations were characterized as “likely the handiwork of a ChatGPT or similar artificial intelligence program’s hallucinations.” The attorney was also ordered to report to bar oversight committees and complete AI ethics training.

Senior District Judge Judith Herrera (D.N.M.): In a pro se case seeking “$355.69 quintillion” in damages, characterized as “quite simply ludicrous,” she ordered $8,640 in sanctions attributable in part to AI hallucinations in the filing.

These sanctions confirm that D.N.M. is actively identifying and sanctioning AI-related misconduct, with parallel exposure under Rule 16-303 candor obligations and potential professional discipline.

What AI-related rules are pending in New Mexico?

In January 2026, Attorney General Raul Torrez and Rep. Linda Serrato announced the Artificial Intelligence Accountability Act (synthetic media and deepfakes), introduced as HB 141 in the 2026 New Mexico legislative session. Per the bill page, HB 141 was postponed indefinitely on Legislative Day 1 and did not advance. As proposed, key features included mandatory disclosure of AI-generated synthetic content, free provenance detection tools from covered providers, Attorney General enforcement, and civil penalties up to $15,000 per violation. The bill also proposed an additional year of imprisonment for using generative AI to commit a felony. AG announcement. The Act primarily targets synthetic media rather than attorney conduct. Litigators who use AI-generated demonstratives should monitor for a successor bill in the next session.

HB 60 (Consumer Protection AI Act, 2025 session) was postponed indefinitely on 2025-02-25 and did not pass. Bill page. A successor bill targeting deployers of high-risk AI systems is expected; law firms using AI-driven intake or document automation should track the next session.

How do malpractice carriers in New Mexico treat AI use?

New Mexico has no single dominant state-endorsed malpractice carrier comparable to OBLIC in Ohio. ALPS (Attorney’s Liability Protection Society) is active in New Mexico. ALPS New Mexico page. Standard professional liability policies do not explicitly address AI-generated negligence claims. Coverage may turn on whether unreviewed reliance on AI output qualifies as a “professional service” at all. Opinion 2024-004’s verification requirement raises the standard of care a denial would be measured against.

What does my New Mexico malpractice carrier ask about AI at renewal?

ALPS has not published New Mexico-specific AI renewal application items. Opinion 2024-004 sets the substantive standard; produce documentation that maps to it. A written AI use policy. Vendor due diligence records aligned with the opinion’s confidentiality checklist. Training records. Matter-level verification logs. Firms filing in D.N.M. should also be ready to show a standing-order compliance workflow, since a sanctioned filing creates a chain to malpractice exposure. Confirm specific application items directly with ALPS or the firm’s broker.

What documentation should a New Mexico firm keep on file?

Month one (foundational)

1. (Owner: managing partner + firm administrator) Written AI use policy. Cover approved tools, what client data may and may not be input, output verification procedures, billing classification, and supervision. Required by implication of Opinion 2024-004 and Rules 16-501 and 16-503.
2. (Owner: litigation lead) D.N.M. and judge-specific filing workflow. Before each filing, confirm whether the assigned judge has an AI standing order, whether AI was used in preparation, and that any required disclosure and accuracy certification language is included. Tracks the D.N.M. standing order and Judge Sugg’s individual order.
3. (Owner: litigation lead) Citation verification log. Document that every AI-generated citation and quotation in a filing was independently confirmed in Westlaw, Lexis, or an equivalent database. Required by Rules 16-103 and 16-303 and the D.N.M. accuracy certification.

Months two and three (operational documentation)

1. (Owner: firm administrator + outside IT) Vendor due diligence records for each AI tool used in client matters. Document third-party data sharing, training-data retention, security certifications, and any data processing agreement. Tracks the Opinion 2024-004 confidentiality checklist for Rule 16-106.
2. (Owner: firm administrator) Attorney and staff training records. Document completion of training on the firm’s AI policy and on Opinion 2024-004. Required by Rules 16-501 and 16-503; the Magistrate Judge Martinez sanctions order required AI ethics training as part of the remedy.
3. (Owner: managing partner + billing partner) Engagement letter provisions. Disclose potential AI use, identify safeguards, and address client consent where the tool processes client-specific information. Tracks Rule 16-106 and the conflict-screening obligation.

Months four to six (per-matter discipline)

These are recurring practices, not one-time projects: each new matter exercises them.

1. (Owner: matter lead attorney) Per-matter AI use notes. For each matter where AI was used for research, drafting, or analysis, record which tool was used, what it produced, and which attorney reviewed and verified the output. Supports the D.N.M. accuracy certification and defends against malpractice claims.
2. (Owner: billing partner) Billing review documentation confirming AI efficiency gains are reflected in client bills and that AI subscription costs are treated as overhead rather than disbursements. Required by Rule 16-105.

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