Use AI in your brokerage without exposing client details

When a brokerage talks about AI for real estate agents, it pictures listing copy, but what goes into the chat is a rental application, offer notes for the listing agent or a reply to the title company.

Each of those carries the lines that tie a real person to the deal. The rental application has the applicant’s name, date of birth, Social Security number, phone, email, employer and often a driver’s license number. The offer file adds the buyer’s and seller’s names, the title or escrow file number and, once earnest money moves, a bank account number. When the applicant sends a passport instead, a watermarked passport copy that names the property makes a copy reused elsewhere easy to spot, and a permanent resident can send a watermarked Green Card copy. A license copy can carry the same line, with pages for licenses from California, Texas, Florida, New York, Pennsylvania, Illinois, Ohio, Georgia, North Carolina, Michigan, New Jersey, Virginia, Washington, Arizona, Tennessee, Indiana, Massachusetts, Missouri, Maryland, Wisconsin, Colorado, Minnesota, South Carolina, Alabama, Kentucky, Oregon, Oklahoma, Connecticut, Utah, Iowa, Nevada, Arkansas, Mississippi, Kansas, Louisiana, Nebraska, New Mexico, Idaho, West Virginia, Hawaii, New Hampshire, Maine, Montana, Rhode Island, Delaware, South Dakota, North Dakota, Alaska, Vermont, Wyoming and DC. If the application asks for a copy of the Social Security card, the applicant can watermark the Social Security card with the brokerage and the month first.

Those are the lines Nonimo redacts before the text leaves the agent’s desk. In a made-up rental application, the name, date of birth, SSN, phone and email came out as placeholders, while rent, income and rental history stayed readable. What OpenAI keeps from a chat is in our ChatGPT data guide.

With Nonimo, ChatGPT for real estate agents takes one extra keystroke: the agent selects the text, presses the key, and only the version with placeholders goes to the chat.

On that Mac or Windows computer, every identifier Nonimo recognizes becomes a placeholder, and only that version goes to the chat. When ChatGPT, Claude or Copilot answers with the placeholders, Nonimo writes the real names and numbers back into the reply on your screen, because only your computer knows what each one stands for.

In the example below, the owner still gets a useful summary, since the rent, the income, the references and the dog are all there. The SSN cannot exist, because the Social Security Administration has never issued area number 000. It was redacted anyway: the label in front of it is the proof, and the date of birth went the same way.

This SSN carries the general REFERENCE label because no real number starts with 000. A real Social Security number gets the SSN label, and a bank account number next to its ABA routing number on wiring instructions gets a label of its own. Either way, the number is swapped out on the agent’s computer. What the app sends us is on our security page.

AI in real estate already has a regulator’s warning on record: the North Carolina Real Estate Commission’s January 2026 bulletin, Responsible Use of Artificial Intelligence in Real Estate.

Its privacy section puts two plain questions to licensees. Are you using AI to review contracts and documents that hold a client’s date of birth or Social Security number? Do you give AI bank account information to help reconcile a trust account?

The commission’s answer is the sentence quoted here: that data poses a significant confidentiality risk and a potential breach of fiduciary duty. It asks licensees to protect the client’s personal identifying information, to discuss AI with clients and get their permission before using it on anything that contains that information, and it recommends that brokerages put policies and procedures in place. When a tenant’s ID has to change hands, a watermarked passport card copy that names the listing and the month is safer than a clean one.

The bulletin speaks to North Carolina licensees, but the questions fit any brokerage, and the client’s permission is still yours to ask for. What a brokerage can add is a step on each computer, so that less of the client reaches the AI company in the first place. The written side belongs in an AI use policy, with approved tools named.

On the sales side the paper changes, not the pattern: offer notes name the buyer and the seller, the title or escrow file number follows the deal to closing, and earnest money instructions carry a routing and an account number.

Those are the lines an agent pastes to get a draft email to title, and each is handled by its proof. A number that arithmetic proves is swapped without a question. A value recognized by the label in front of it, or by where it sits on the line, is swapped too, but in view, with the reason stated, and one click puts it back. Better one placeholder too many than a client’s name at the AI company.

In made-up offer notes, the names after Buyer and Seller, the title file number and the earnest money account number came out as placeholders, while price, deposit and closing date stayed readable, so the draft to title still makes sense. If a file already went in unredacted, our guide on client data in ChatGPT walks through the next steps.

Plenty of AI tools for real estate agents write listings and answer leads; Nonimo sits in front of whichever one your agents already use, on Windows or on a Mac.

Nonimo’s Free plan covers 100,000 words a month, with no account and no credit card. Personal, for one person, and Team, priced per person, remove the cap and can be billed monthly or yearly; the details are on our plans and pricing page. The download is at the top of this page. Start where the paper lands: the leasing desk and the transaction coordinator.

One computer at the brokerage is enough to start, and each agent installs it on their own. Brokerage-wide, IT deploys a browser extension by policy that covers text without the key, as our page for organizations explains.

Each agent’s app can export a signed usage report with counts by category, never the text. Your brokerage keeps its own records under its policy and its state’s rules, and not one word of your clients’ files reaches us.