What Happens When an NJ Client Finds Out You Used AI — and Nobody Told Them

There's a scenario playing out quietly in small New Jersey law firms right now. An attorney uses ChatGPT or a legal AI tool to draft a demand letter. The work product is solid. The client never asks. The attorney never says anything. And for a while, everyone moves on.

Then the client gets the bill.

Or they read a news story about AI hallucinations. Or they hear from a friend whose lawyer "uses robots now." And suddenly they're not asking whether the letter was well-written — they're asking whether they were deceived.

This isn't a hypothetical scare story. It's the logical endpoint of a professional responsibility gap that thousands of NJ solo and small-firm attorneys are sitting in right now, and most of them haven't thought carefully about what happens when that gap closes without warning.

The Complaint Doesn't Have to Be About the Work

Here's what makes this risk unusual: a client doesn't need to prove the AI-assisted work was bad to file a grievance. They need to argue that material information about how their matter was handled was withheld — and that they had a reasonable interest in knowing it.

New Jersey's RPC 1.4 requires attorneys to keep clients "reasonably informed" about the status and means of their representation. Combine that with RPC 8.4(c)'s prohibition on conduct involving "dishonesty, fraud, deceit, or misrepresentation," and you have a framework that doesn't require negligence. It requires omission.

The NJSBA's Ethics Hotline has been fielding more AI-related calls in the past 18 months. While no formal NJ ethics opinion on AI disclosure has been issued as of this writing, the ABA's Formal Opinion 512 (2024) made clear that lawyers using AI tools must ensure they are not deceiving clients about the nature of the work product or the means used to produce it. New Jersey ethics guidance consistently tracks ABA formal opinions closely, and NJ courts look to them as persuasive authority.

That ABA opinion matters here. It doesn't mandate disclosure in every case, but it draws a line: if a client would consider the use of AI to be material to their decision-making — or if the fee arrangement creates a reasonable expectation that the work is the product of solely the attorney's labor — silence can cross into misrepresentation.

The Fee Structure Makes It Worse

If you're billing hourly, the math becomes uncomfortable fast. A task that would have taken two hours now takes twenty minutes with AI assistance. Did you bill for two hours anyway? Did you bill for twenty minutes but charge the same rate without explaining why? Did you pass along the AI tool's subscription cost as a disbursement?

New Jersey's RPC 1.5 requires that fees be reasonable and that billing practices not be deceptive. The AI efficiency dividend creates a quiet billing ethics problem that most solo attorneys haven't resolved in writing. A client who later learns AI cut your drafting time by 70% — and who was billed at the full hourly rate for the pre-AI equivalent — has a colorable argument worth taking seriously.

This isn't a reason to avoid AI. It's a reason to get ahead of the conversation proactively rather than reactively.

What a Simple Disclosure Actually Looks Like

The good news: disclosure doesn't have to be dramatic, apologetic, or even particularly detailed to do the job. A single paragraph in your engagement letter is enough to neutralize most of the risk.

Here's a functional example:

"This firm may use AI-assisted legal technology tools to support research, drafting, and document review. All work product is reviewed and approved by a licensed attorney before it is used or communicated on your behalf. The use of these tools does not affect the confidentiality of your information, which remains protected under applicable law and our professional obligations."

That's it. Three sentences. It sets the expectation, affirms oversight, addresses the data concern clients usually think but don't ask about, and creates a documented record that you were transparent from day one.

If your engagement letter doesn't have something like this already, you are carrying unnecessary exposure on every AI-assisted matter you open.

The Proactive Posture Is Also the Marketing Posture

There's a secondary benefit that solo and small-firm attorneys often miss: clients who are told about your AI use and who understand it reflects efficiency and modernity often react positively. The attorneys losing clients over AI aren't the ones who disclosed — they're the ones whose clients found out some other way.

Transparency about AI isn't just an ethics obligation. It's a differentiator. In a market where most small firms are still hoping the question never comes up, the attorney who has a clear, confident answer ready is the one who looks like they have their practice under control.

Get your engagement letter updated this week. The next client intake is your opportunity to close the gap before it closes itself.