This is the section that does the most work, and it should be written as examples, not categories. Vague instructions fail because employees cannot map "confidential" onto the document in front of them at 9 p.m. The data flowing into AI tools is not marginal: roughly two in five AI interactions involve sensitive data, counting prompt text, copy and paste actions and file uploads, and staff input sensitive data into AI tools about once every three days on average Cyberhaven's AI adoption and risk findings. The same research finds that a substantial share of usage runs through personal rather than corporate accounts, which is exactly what a bypassable policy produces Cyberhaven on personal account usage.
The five examples below are drawn from published policy guidance and should be adapted to your business, not copied verbatim.
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Customer and client personal data. Names plus account numbers, addresses plus dates of birth, and anything that becomes identifiable when combined. Harvard's guidance is direct: remove unnecessary personal, confidential, proprietary or identifying information before sharing content with an AI system Harvard's data protection practices.
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Financial and payroll records. Salary bands tied to named employees, bank details, invoices with pricing terms, and unreleased financial results. This is a common paste because people use chat tools to reformat spreadsheets.
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Source code and technical assets. Proprietary code pasted into a debug session is the canonical example of well-intentioned exposure, and it is why code deserves its own line even if your approved coding assistant is separate from your approved chat tool Read AI on real leakage incidents.
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Contracts and third-party confidential material. Anything under a confidentiality agreement with a client, supplier or partner. Pasted contract text can create a disclosure obligation to a third party, not just an internal security problem Norton Rose Fulbright on confidentiality of inputs.
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Credentials and system secrets. Passwords, API keys, connection strings, and internal hostnames. Staff paste these more often than expected when troubleshooting, and no legitimate use case requires it.
Add a sixth line to the section that most drafts miss: meeting recordings and transcripts. If your organization allows AI meeting assistants, say whether participants must be told, because recording and consent rules vary by jurisdiction and by policy Harvard's guidance on meeting tools.
A note on shortcuts that do not work
Opting out of training is not the same as zero retention, and zero retention does not mean zero access. Providers retain content for a period for abuse monitoring and safety review, and some review paths are not optional an operational breakdown of opt-out limits. Under standard consumer terms, input content may be used to maintain and improve the service, and users must opt out formally; enterprise tiers differ, and API content is treated differently again ISACA on security controls for employee ChatGPT use. A policy that treats those tiers as equivalent will be wrong in one direction or the other.
Vendor claims need the same scrutiny. Many vendors now offer enterprise terms under which business data is not used for training by default, but that is a statement about model training, not about storage or human review OpenAI's enterprise privacy commitments. One privacy analysis of training opt-outs lays out the account-type differences plainly, including default retention periods that persist even when training is disabled the training opt-out walkthrough. Write the policy so it does not depend on a marketing sentence.
If you want a scrubbing control rather than a rule, the mechanics are simple: replace identifiers with placeholders before the request leaves your systems, and keep the mapping on your side. The model still answers the question; the sensitive value never travels.
scrubbed, mapping = scrub(user_text) # "My SSN is [SSN_1]"
response = client.chat.completions.create(
messages=[{"role": "user", "content": scrubbed}]
)
final = restore(response, mapping)
That pattern is worth a paragraph in the policy's appendix, because it gives engineers a compliant path instead of a prohibition.