People now ask AI chatbots about their contracts, their employers, their injuries, and their disputes. Those conversations can show what a person knew, when they knew it, and what they planned. In a growing number of matters, they are relevant evidence.
They are also easy to lose. A user can delete a chat in one click. Temporary chats do not stay in the history. And the download link for an export can expire within a day. If AI chats may matter in your case, address them in your legal hold and collect them early.
This post shows a defensible way to export consumer ChatGPT and Claude history from a custodian’s own account.
Watch the walkthrough
This 3-minute video shows the real ChatGPT and Claude export screens, then hashes and logs a fictitious demonstration export.
Read the video transcript
When a client or a witness has used ChatGPT or Claude, those conversations can be evidence, and they can disappear quickly. This walkthrough shows a defensible way to preserve them from a custodian’s own personal account.
Start with the legal hold. Name AI tools specifically in the hold notice, because a custodian who reads emails and documents may not think of a chatbot. In the interview, ask which tools and which accounts they used, personal, work, or both, and whether they used temporary chats or deleted anything. Work accounts on business plans are usually collected through the organization’s administrator tools, so bring in IT early.
For a personal ChatGPT account, the custodian signs in on the web, opens Settings, and selects Data controls. Export data is near the bottom of the list. Have the custodian do this while you watch, in person or over a shared screen, and record the session.
ChatGPT asks for confirmation before it starts. The dialog says that account details and chats are included, that a download link will be emailed, and that the link expires after 24 hours. That last point is the trap. If the email arrives on a Friday and nobody downloads it, the link is gone.
According to OpenAI’s help center, the export can take up to seven days to arrive, and the link expires 24 hours after you receive it. The export cannot restore chats that were already deleted. And self-service export is not available for ChatGPT Business or Enterprise workspaces, which is why those accounts need the administrator route.
Claude works the same way. The custodian opens Settings, then Privacy, and selects Export data. Anthropic emails a download link. The export runs from the web or the desktop app, not from the phone apps, and anything deleted before the export is not included.
As soon as the file is downloaded, calculate a hash value. A hash is a digital fingerprint of the file. If even one byte changes, the hash changes. Here we hash a demonstration export, copy it to evidence storage, and hash the copy. The two values match, which shows that the copy is identical to the original. On Windows, use Get File Hash in PowerShell. On a Mac, use shasum.
Record every step in a chain of custody log: the custodian and account, the method, when the export was requested and downloaded, the file name and size, the hash value, who collected and witnessed it, where it is stored, and every transfer after that.
Why a supervised export? The custodian keeps their own password, and the recording shows exactly what was done. Screenshots are a last resort, because they are hard to authenticate and easy to dispute. And in a civil case, you generally cannot get chat content from the provider by subpoena, because the Stored Communications Act limits what providers can disclose. The custodian’s own export is usually the practical path.
LGTLS202, AI Chat Evidence for Litigation Support, follows one fictitious matter from legal hold to trial exhibit. Find it at legalgpts.com.
Step 1: Put AI chats in the legal hold
Name AI tools specifically in the hold notice. A custodian who reads “emails and documents” may not think of a chatbot. Ask in the custodian interview:
- Which AI tools did you use (ChatGPT, Claude, Copilot, Gemini, others)?
- Which accounts: personal, work, or both? Which plan?
- Did you use temporary or incognito chats, projects, or memory features?
- Have you deleted any conversations about this matter?
Work accounts on business plans (for example, ChatGPT Business or Enterprise, Claude Team or Enterprise, or Microsoft Copilot) are usually collected through the organization’s administrator tools, not by the custodian. Bring in IT early for those.
Step 2: Export ChatGPT history (personal accounts)
As of November 2026, OpenAI’s help center describes this path for personal accounts:
- Sign in to ChatGPT on the web.
- Open the profile menu and select Settings.
- Select Data controls.
- Under Export data, select Export, then Confirm export.
- Wait for the email or text message. OpenAI says this can take up to 7 days.
- Select Download data export. The link expires 24 hours after you receive it.
The download is a ZIP file with the chat history and other account data. Two points matter for evidence: the export cannot restore chats that were already deleted, and self-service export is not available for ChatGPT Business or Enterprise workspaces.
Step 3: Export Claude history (personal accounts)
Anthropic’s help center describes this path for Free, Pro, and Max accounts:
- Open Claude on the web or in Claude Desktop. Export is not available from the iOS or Android app.
- Select your initials in the lower-left corner, then Settings.
- Open Privacy and select Export data.
- Download the ZIP file from the email link before it expires.
Anthropic states that messages, files, and projects deleted before the export are not included.
Step 4: Hash, log, and store
As soon as the ZIP file is downloaded, calculate a hash value. A hash is a digital fingerprint: if one byte of the file changes, the hash changes.
Windows (PowerShell):
Get-FileHash .\chatgpt-export.zip -Algorithm SHA256
macOS (Terminal):
shasum -a 256 chatgpt-export.zipRecord the hash in a chain-of-custody log, copy the ZIP file to your evidence storage, and hash the copy to confirm that the values match. Work only from copies after that.
| Log field | Example (fictitious) |
|---|---|
| Matter | Acme Contractors v. Globex Logistics |
| Custodian and account | Dana Ruiz, personal ChatGPT Plus account |
| Method | Supervised self-service export, screen recorded |
| Requested and downloaded | Date and time of each, with time zone |
| File name and size | chatgpt-export.zip, size in bytes |
| SHA-256 hash | The full value |
| Collected by and witnessed by | Names |
| Storage location | Evidence share path |
| Transfers | Each handoff, with date and person |
Download: Sample chain-of-custody form for AI chat exports (fillable PDF, 2 pages). It covers the matter, custodian and account, export and hash details, evidence copy verification, a transfer log, and a certification block. Adapt it to your firm’s procedures.
Why a supervised export
The custodian signs in. You watch, or share the screen, and record the session. This keeps the custodian’s password private and gives you a record of exactly what was done. Screenshots are a last resort: they are hard to authenticate and easy to dispute.
In general, you also cannot expect to subpoena chat content from the AI provider in a civil case, because the Stored Communications Act limits what providers can disclose. The custodian’s own export is usually the practical path.
Learn the full process
LGTLS202: AI Chat Evidence for Litigation Support follows one fictitious matter from legal hold to trial exhibit: preservation, collection methods, review and privilege, production, and authentication.
Sources
- Exporting your ChatGPT history and data, OpenAI Help Center
- Data controls in ChatGPT, OpenAI Help Center
- Export your Claude data, Anthropic Help Center
- Stored Communications Act, 18 U.S.C. § 2702; Federal Rules of Evidence 901 and 902(14); Fla. Stat. § 90.901
Current as of November 2026. Export menus, timelines, and plan rules change. Confirm the provider’s current help article before each collection. This article is general education, not legal advice.