ABA Formal Opinion 512 lets lawyers use generative AI to draft email, as long as they review what goes out and stay responsible for it. The opinion says lawyers "may not leave it to GAI tools alone to offer legal advice to clients, negotiate clients' claims, or perform other functions that require a lawyer's personal judgment or participation." So an email a lawyer reviews and sends keeps the lawyer's normal signature. An AI agent that emails on its own should stick to routine tasks, say it is an AI and not a lawyer, and name the lawyer who supervises it.
This is general information about ethics opinions, not legal advice. ABA opinions are guidance; your state's rules and bar opinions decide what applies to you. Applying these opinions to email signatures is our reading.
| Who writes and sends | Signature block | Disclosure |
|---|---|---|
| AI drafts, the lawyer reviews and sends | The lawyer's own | A choice; the client may ask |
| AI drafts, a paralegal reviews and sends | The paralegal's own, with a non-lawyer title | A choice; the client may ask |
| An agent sends routine updates on its own | The agent's own, naming the supervising lawyer | Yes: "AI assistant, not a lawyer" |
| A chatbot or agent handles intake | The agent's own | Yes, per Florida Bar Ethics Opinion 24-1 |
What ABA Formal Opinion 512 says, rule by rule
The ABA Standing Committee on Ethics and Professional Responsibility issued Formal Opinion 512, "Generative Artificial Intelligence Tools", on July 29, 2024. It opens by saying lawyers using these tools "must fully consider their applicable ethical obligations, including their duties to provide competent legal representation, to protect client information, to communicate with clients, to supervise their employees and agents, to advance only meritorious claims and contentions, to ensure candor toward the tribunal, and to charge reasonable fees."
| Model Rule | What Opinion 512 says | What it means for AI email |
|---|---|---|
| 1.1 Competence | Relying on AI output without "an appropriate degree of independent verification or review" could breach the duty; "the lawyer is fully responsible for the work on behalf of the client" | Review AI-drafted email before it reaches a client |
| 1.6 Confidentiality | Client informed consent is required before putting representation information into a "self-learning" tool, and boilerplate in engagement letters "is not sufficient" | Check what the email tool does with the client data it reads |
| 1.4 Communication | Disclosure depends on the facts, but lawyers "must disclose their GAI practices if asked by a client" or if the engagement terms require it | Tell a client the truth when they ask whether AI wrote an email |
| 5.1 and 5.3 Supervision | "Managerial lawyers must establish clear policies regarding the law firm's permissible use of GAI" | Write down which emails an agent may send alone |
| 1.5 Fees | Hourly billers "must bill for their actual time"; a tool that works like office equipment is overhead unless disclosed in advance | Bill the time spent drafting and reviewing |
Agents can schedule and remind; advice stays with the lawyer
Opinion 512 was written about tools a lawyer uses. Its line on delegation still reaches agents: a lawyer may use AI "as a springboard or foundation for legal work", but "lawyers may not abdicate their responsibilities by relying solely on a GAI tool to perform tasks that call for the exercise of professional judgment."
California has since addressed agents directly. The State Bar's Board of Trustees approved updated Practical Guidance on May 14, 2026, adding a section on agentic AI at the California Supreme Court's request. It says:
- "Lawyers must not deploy agentic systems in a manner that allows the system to make substantive legal determinations, communicate legal advice, prepare and file pleadings, or otherwise act in a representative capacity without meaningful lawyer supervision and review."
- "A lawyer must not deploy an agentic AI system in a manner that permits autonomous external transmission of client information, including automated communications, filings, or data transfers, without appropriate safeguards and human review."
- "Lawyers must not permit AI systems to autonomously file documents, communicate with the court, or make representations on the lawyer's behalf."
Read together, these leave room for agents that schedule, confirm receipt of documents or send reminders, and keep advice, negotiation and anything sent to a court with the lawyer. How much review counts as "meaningful" is a judgment for the firm and its bar.
When a firm's AI must say it is not a lawyer
Florida Bar Ethics Opinion 24-1 (January 19, 2024) is the most direct statement on disclosure. Its summary says: "Generative AI chatbots that communicate with clients or third parties must comply with restrictions on lawyer advertising and must include a disclaimer indicating that the chatbot is an AI program and not a lawyer or employee of the law firm." The opinion adds that "a lawyer must inform prospective clients that they are communicating with an AI program and not with a lawyer or law firm employee."
The opinion compares AI to nonlawyer assistants. It cites Florida guidance that nonlawyers conducting intake must "[c]learly identify their nonlawyer status to the prospective client". A paralegal's signature already does this with a title such as "Paralegal". An agent's signature can do the same with "AI assistant, not a lawyer".
Opinion 24-1 speaks of chatbots, so applying it to an email agent is an interpretation. An agent that answers inquiries by email does the same job as an intake chatbot, which makes the disclaimer a sensible default outside Florida too. In the EU, the Commission's Article 50 guidelines separately expect AI agents to disclose that they are AI and on whose behalf they act; our AI email disclosure guide covers that side.
What goes in the signature block
An email the lawyer reviewed and sent. The lawyer's normal block: name, title, firm, contact details, and the firm's confidentiality footer. The lawyer signature block template lays it out and cites the rules behind each line. A disclosure line is a choice here; some firms add one as policy.
I use AI tools to help draft some correspondence. I review every email before it is sent.
An email an agent sent on its own. The agent's own block, naming the lawyer who supervises it:
Ada, AI assistant to Maya Okafor, Partner (not a lawyer) | Okafor & Reyes LLP | maya.okafor@okaforreyes.example
This message was sent by Okafor & Reyes LLP's AI assistant, which is not a lawyer and cannot give legal advice. Maya Okafor supervises this matter; reply to reach her.
A firm-wide footer. The confidentiality notice the firm already uses, plus, if the firm chooses, a policy line:
Okafor & Reyes LLP uses AI tools in some client communications under lawyer supervision. Ask your lawyer if you have questions about how we use them.
The firm and people above are fictional. The signature matters for one more reason: an email signed with a lawyer's name and title reads as that lawyer standing behind it. Our post on whether an AI agent's email can bind you goes through how courts have treated signature blocks.
A short AI email policy for a law firm
Opinion 512 asks managerial lawyers for "clear policies" and training. For email, the policy can be short:
- List what an agent may send alone. Scheduling, document receipt, status reminders. Everything else waits for a lawyer.
- Require approval before advice goes out. Drafts that touch the merits go to the responsible lawyer first.
- Send from firm systems. An agent that sends through the firm's mailbox leaves a copy in Sent Items for supervision and the file.
- Mark AI work in the file. Opinion 512 records a training suggestion that "all materials produced by GAI tools be marked as such when stored in any client or firm file".
- Fix the signature and disclosure. Each agent gets one signature, with "AI" and "not a lawyer" in it, set by the firm.
- Tell clients when they ask. If a client asks whether AI was used, Opinion 512 says the lawyer must disclose it.
Firm signatures for lawyers, staff and AI assistants with Signatoro
Signatoro gives every lawyer, paralegal and AI assistant at a firm the same signature design from one place:
- Agentic sending and API fetch. An assistant fetches the current signature when it sends, over Signatoro's MCP server or the signature API, and appends it. The model never types the lawyer's name or contact details.
- Each assistant as its own person. An agent with its own address can be its own person in the firm's Signatoro company, titled "AI assistant to Maya Okafor (not a lawyer)". See one email signature per AI agent.
- One footnote for the firm. On the larger Company plans, the owner writes the confidentiality notice once, and it sits under every signature, people and agents alike.
One signature block for the whole firm, AI assistants included
Set the firm's logo and confidentiality footnote once. Every lawyer, paralegal and AI assistant gets the current version with each email.
Frequently asked questions
Do lawyers have to tell clients they use AI to write emails?
Not always. ABA Formal Opinion 512 says the facts decide whether Model Rule 1.4 requires disclosure, and that "client disclosure may be unnecessary" in some cases. Lawyers must disclose if a client asks, if the engagement terms require it, or if client information goes into a self-learning tool. Check your state's rules.
Can an AI agent email clients on a lawyer's behalf?
For routine matters, with supervision. ABA Opinion 512 says lawyers may not leave legal advice or negotiation to AI alone, and California's 2026 guidance says agents must not communicate legal advice "without meaningful lawyer supervision and review." An agent sending scheduling or status emails should say it is an AI and name the supervising lawyer.
Does ABA Opinion 512 require an AI disclaimer in email?
Opinion 512 is silent on email signatures and disclaimer lines. Florida Bar Ethics Opinion 24-1 requires AI chatbots that communicate with clients or third parties to disclose that they are AI and not a lawyer, and an email agent doing similar work is a natural fit for the same line.
Is ABA Formal Opinion 512 binding?
No. ABA formal opinions interpret the ABA Model Rules and guide state bars, courts and lawyers. Lawyers are bound by the rules of the jurisdictions where they are admitted, so read 512 alongside your state bar's own opinions.
What should an AI assistant's signature at a law firm say?
Its name, that it is an AI, that it is not a lawyer, the lawyer who supervises it, the firm, and how to reach that lawyer. For example: "Ada, AI assistant to Maya Okafor, Partner (not a lawyer), Okafor & Reyes LLP".
Sources
Checked on 2026-10-07:
- American Bar Association: Formal Opinion 512, Generative Artificial Intelligence Tools, July 29, 2024
- The Florida Bar: Ethics Opinion 24-1, January 19, 2024
- The State Bar of California: Practical Guidance for the Use of Generative Artificial Intelligence in the Practice of Law, 2026 update
- The State Bar of California: Ethics and technology resources, approval of the 2026 update on May 14, 2026
- European Commission: Guidelines on the transparency obligations under Article 50 of the AI Act, C(2026) 5054, paragraph 31