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AI data leakage 6 min read

ChatGPT and client data: a meeting note full of IBANs

Asking an AI tool to write up a meeting note is fine; the client's IBANs and income do not need to go in. What an adviser takes out before pasting, task by task.

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Quick answer

Writing up a meeting note with an AI tool your firm has approved for it is fine. The client data does not need to go in: an IBAN, a citizen service number or a diagnosis does not make the note any better, but it does leave the firm. In a free or personal account that is a data breach, because there is no data processing agreement. Before pasting, replace everything that makes the client identifiable with a placeholder such as [client] or [amount], and keep what describes the situation. If the client is still identifiable without a name, the note does not belong in a tool that has not been approved for client work.

01

The task can usually go into an allowed AI tool; the client should not be identifiable in it

02

An IBAN or citizen service number in a free account is a data breach, even if you delete the chat straight away

03

Which ChatGPT variant you may use is your firm's decision, and 'No decision yet' does not mean it is allowed

04

Replace client data with placeholders and describe the situation in general terms rather than with names

05

Without a name, a client is not automatically anonymous: a registration plate, a profession or a village can point to one person too

At five o'clock, a mortgage adviser still has three meeting notes to write up. She pastes her notes from the intake meeting into ChatGPT and asks for a tidy version for the file. The notes contain the client's name, her date of birth, the household income, two IBANs and a remark that her partner has been unable to work since last year.

The task made sense: turning loose notes into a readable report is exactly what such a tool is good at. The data did not need to go in. That is the whole answer in one sentence: the task can usually go into an AI tool your firm has allowed for it, and the client should not be identifiable in it. What you need to take out depends on what you ask the tool to do.

Why does this matter more in financial services?

Because the text you handle on an ordinary day is almost always about a client, and because that client has told you things they tell few others. An income, a debt, an account number, the reason a mortgage does not add up after all. In a disability or claims file, there is medical information as well. That openness is the basis of the profession, and it is exactly what is at stake in a prompt.

The Dutch Data Protection Authority received several breach notifications in which employees had put personal data into an AI chatbot, and advises organisations to set clear rules on whether it is allowed, and with which data. For a firm under financial supervision, there is the added question of whether it handles client data with care, because that is part of sound business operations. What that means for a firm is covered in AI in financial services.

This is not about you being the risk. You use the tool because the note gets done faster and reads better. The only question is what goes into the tool with it.

Which ChatGPT are you using?

There is no single ChatGPT. A free or personal account runs under consumer terms: your input can be used to improve the model unless you switch that off yourself, and your firm has no data processing agreement with it. OpenAI states on its enterprise privacy page that the business environments do not use input for training by default. That is a different product on different terms, even though the screen looks the same. The difference is set out in free versus business AI accounts. Whether ChatGPT is safe for client work at all is covered in our article on whether ChatGPT is safe to use at work.

A meeting note with an IBAN in a personal account is therefore a data breach, even if you delete the conversation straight afterwards. Which variant you may use is a decision for your firm. Many firms have allowed Copilot and have decided nothing about ChatGPT yet. "No decision yet" does not mean it is allowed; it means nobody has looked at it. As long as that is the case, no text with client data belongs in it.

At firms that work with BeeSensible, the decision appears in the browser the moment you open an AI tool: allowed, limited use with a condition, no decision yet or not allowed, with the alternative named. Usually you can carry on; the only exception is a tool that is not allowed, where your firm may have set things up so that you cannot continue.

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DeepSeek
Critical · 90/100
Not allowed
Otter.aiNew
High · 68/100
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Grok
High · 67/100
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High · 62/100
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Medium · 55/100
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Medium · 53/100
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More about AI Governance

What do you take out for each task?

The rule of thumb from what not to share with AI applies here too: if you would not email this to a stranger outside the firm, it does not belong in a chatbot. At an advisory firm or insurer, this is what it looks like task by task.

TaskWhat you want to pasteWhat comes outHow you still get the task done
Write up a meeting noteYour notes from the intake meetingName, date of birth, citizen service number, IBANs, exact amounts, the health of client or partnerDescribe the situation in general terms: "two earners, one income uncertain, wants to move within a year"
Make an advice report easier to readThe whole reportAll client data and amountsPaste only the paragraphs that read badly, with [client] and [amount] in place of the data
Answer a complaintThe complaint emailName, policy or file number, account number, exactly what happenedDescribe the kind of complaint: "client feels the premium increase was announced too late"
Summarise a claimThe claim form and attachmentsName, registration plate, policy number and, for injury claims, anything about healthNot in a tool that has not been approved for it; ask which process your firm uses
Email about missing documentsThe previous email threadName, file number, the content of the applicationDescribe the message: "a friendly reminder that two payslips are still missing"

The three ways to take data out of a prompt (remove, replace and mask) are explained, with examples, in the prompt redaction guide. For a meeting note, replacing works best: the structure stays intact, so the tool still understands what you are asking, and the real details stay at the firm.

One thing stands out in the table: the IBAN appears every time, and there is not a single task for which the tool needs it. An account number adds nothing to a summary or a letter. It is the easiest thing to leave out and the thing that does most harm if it leaks.

A note without a name is not automatically anonymous

A claims handler neatly removes the name from a claim before asking an AI tool to summarise it. What remains: the registration plate, the date of the accident and a line saying that the driver is the GP in a village of three thousand people. Anyone who knows the case knows who it is.

Taking out the name does not make someone anonymous. Together, an IBAN, a policy number, a date of birth, an address or the situation itself can point to one person. How that works, and why it happens more easily with a client in a recognisable profession, is explained in our article on quasi-identifiers. So look at the whole text before you paste, not just at the name at the top.

If the client is still identifiable without that data, the text does not belong in a tool that has not been approved for client work. That costs you a quarter of an hour of your own work, and the file stays where it belongs.

How do you catch it while you work?

A list in your head works until it gets busy. At five o'clock, with three notes to go, an IBAN slips through. That is why it helps if sensitive data is highlighted as you type or paste, before you send.

BeeSensible highlights sensitive data as you write a prompt in the tools you already work in: an IBAN or citizen service number in red, a name or income in yellow. You choose what to do with it (mask it, remove it or leave it), unless your firm has set masking on paste or on send to "Always on". What you type is not stored, and an admin only sees counts, never your text. The AI tools page explains exactly what it does, the page for financial services shows what it looks like for a firm like yours, and the rest of the subject is under AI governance.

Tomorrow the adviser from the first paragraph pastes the situation instead of the client: two earners, one income uncertain, wants to move within a year. The note is just as good, and the IBANs stay where they belong: in the file.

FAQ

Common questions

Can I ask ChatGPT to write up a meeting note?

The task itself, turning notes into a readable report, is fine in an AI tool your firm has allowed for it. The client data in it is not: name, date of birth, citizen service number, IBANs, exact amounts and anything about health come out before you paste. Describe the situation in general terms, such as two earners with one uncertain income, and the tool does its job just as well.

Is it a data breach if an IBAN ends up in a free ChatGPT account?

Yes. A free or personal account runs under consumer terms, without a data processing agreement with your firm. Personal data then leaves the organisation without any agreement covering it, and that is a data breach, even if it was accidental and even if you delete the conversation afterwards. Report it to the person who registers data breaches at your firm.

What is the difference between free ChatGPT and the business version for client data?

With a free or personal account, your input can be used to improve the model unless you switch that off yourself, and there is no data processing agreement. The business environments exclude input from training by default and do offer that agreement. Which variant you may use, and with which data, is a decision for your firm, not for the tool.

Which data do I take out of a meeting note before pasting?

Everything that makes the client identifiable or describes their financial or medical situation: name, date of birth, address, citizen service number, IBANs, policy and file numbers, exact incomes and amounts, plus the health of the client or their partner. What you keep is the structure: the kind of household, the kind of wish, the kind of uncertainty. That is enough for the tool.

Is the note anonymous once the name is out?

Not by itself. Together, a registration plate, a policy number, a date of birth or the situation itself can point to one person, especially a client with a recognisable profession in a small town. Look at the whole text, not just the name at the top. If the client is still identifiable, the text does not belong in a tool that has not been approved for client work.

Portrait of Rens Timmermans from BeeSensible

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