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License law firm data to AI: questions for counsel

& ClaudePublished Updated

The short answer

Much of a law firm's archive is client information. Summaries of ABA Formal Opinion 512 say it requires informed client consent before client information goes into AI. No published ABA opinion addresses transferring an archive. Mercor and micro1 list legal work in their data partnerships. Ask your ethics counsel.

Check your data
Three checks before law firm files reach a buyerClient consentInformed, notboilerplatePrivilegeClient holds itBuyer fitSelf-reported listsPrivilege belongs to the client, and disclosingit to a third party generally waives it.Three checks before law firmfiles reach a buyerClient consentInformed, not boilerplatePrivilegeClient holds itBuyer fitSelf-reported listsPrivilege belongs to theclient, and disclosing itto a third partygenerally waives it.

This page gives a firm questions to ask. There's no pitch in it, and every legal call sits with the firm's own ethics counsel.

Two name it, in different senses. Mercor's data page lists legal as a sector. micro1's data partnerships page lists legal and contracts as an area, which describes contract workflows more than law firm files. All of it is self-reported. See what industry means for the full comparison.

Mercor's research team also maps where AI is tested. Its Benchmark Map (Oct 2026) counts 5 of 7 legal occupations as covered, but says the benchmarks heavily cover lawyers' tasks and barely cover those of legal secretaries or court clerks. My reading is that a firm's filing and docketing records sit on the less-tested side. The map measures tests, not purchases, and names no price.

What does ABA Opinion 512 say?

Opinion 512 applies the confidentiality rule, Model Rule 1.6, to a lawyer's use of generative AI. Summaries by Frankfurt Kurnit Klein & Selz and a legal-ethics database say it requires informed consent before client information goes into a self-learning tool. It says general boilerplate in engagement letters purporting to authorize AI use is not sufficient.

I couldn't open the ABA's own pages, which blocked my fetch. The opinion covers a lawyer using a tool. Licensing puts the archive in a buyer's hands, which is a different act, but it's the closest published guidance I found. State bars adopt their own versions of the rules.

Who holds the privilege in law firm records?

As a general rule the privilege belongs to the client, and disclosing privileged material to a third party generally waives it. Our privilege page covers the cases.

Spirit Airlines excluded privileged materials from its sale, and Frankfurt Kurnit's checklist lists privileged material among the categories to leave out.

What should a firm ask counsel?

  1. Which matters and clients sit in the archive, and do any engagement letters mention data use?
  2. Can each client give informed consent, and has anyone asked?
  3. Which files are the firm's own, such as billing, marketing and internal operations?
  4. What does the firm's state bar say about client information and AI?
  5. Who holds privilege for each matter, and who decides on waiver?

Our rights check and risks page cover the wider data questions.

Talk to a privacy or commercial lawyer in your state before you sign.

micro1 may pay us a referral fee if a company we introduce goes ahead with it. How we are paid

Vaultfish helps you run the process. We are not lawyers and this is not legal advice. If you need counsel who knows this area, we can point you to one. Ask for a referral

Sources 6

The outside sources linked on this page.

  1. mercor.comMercor's data page
  2. micro1.aimicro1's data partnerships page
  3. mercor.comBenchmark Map
  4. technologylaw.fkks.comFrankfurt Kurnit Klein & Selz
  5. news.bloomberglaw.comExcluded privileged materials from its sale
  6. technologylaw.fkks.comFrankfurt Kurnit's checklist