Claude for Attorneys: Research, Drafting, and Review
How attorneys use Claude for legal research orientation, drafting, and document review — with clear rules for source verification, confidentiality, and professional oversight.
Updated 7 min read
Attorneys use Claude for legal research orientation, first drafts of contracts and briefs, and document review support — tasks where language precision matters and where an AI's output can compress the time from raw materials to a workable draft. Every output requires attorney review before it reaches a client or a court. Tools like fenbs let law firms keep non-confidential working rules, approved precedents, and source references in a shared record that connected AI sessions read at the start.
The professional responsibility rules that govern attorney work — competence, confidentiality, supervisory duties — apply to AI use in the same way they apply to any other tool or staff member. Understanding those rules before you use Claude on client work is not optional.
Where Claude fits in legal research
Claude is an orientation tool for legal research, not a primary source. Use it to identify the legal areas likely to be relevant, the standard arguments on each side, and the questions worth investigating — then verify everything in Westlaw, Lexis, or official government sources. Claude may describe cases inaccurately, cite holdings that have been overruled, or produce citations that do not exist. A brief built on unverified AI research is a disciplinary and malpractice risk.
Practical uses in research include: asking Claude to explain a statutory scheme in plain language so you can identify the right questions faster; asking it to map the elements of a claim so you can check whether your facts satisfy each one; and asking it to summarize a long decision you paste in so you can quickly assess its relevance before reading in full.
Verify every case citation Claude produces. Look up the citation in an authoritative database, confirm it exists, confirm the holding is accurately described, and check its current validity. This step is non-negotiable before the case appears in any work product.
Drafting support: contracts and briefs
Claude produces useful first drafts of transactional documents when you give it the deal terms, the parties, and the applicable law. Provide the key commercial terms and the jurisdiction; ask for a standard draft with the provisions you specify. The draft is a starting point — not a final document and not legal advice. Attorney review, jurisdiction-specific adjustments, and client approval are required before use.
For litigation drafts, give Claude the legal standard, the relevant facts, and the argument structure you want to make. Ask for a draft section. Review for accuracy against your actual record and citations; Claude may invent factual details or case quotes that were not in your prompt. Every factual claim in a court filing must be supported by the actual record.
Keep your firm's approved clause language and standard provisions in a shared record. When Claude drafts a section, compare its output to your precedent clauses. Where your approved language differs from Claude's draft, use yours. The precedent your firm has developed and approved is more valuable than a generic draft.
Document review support
For document review, Claude can summarize contracts, identify the key defined terms and obligations, flag deadline and notice provisions, and highlight clauses that differ from a standard form you provide. This pre-reading support is useful before an attorney conducts the authoritative review.
Do not treat Claude's summary as the review itself. A document review for litigation purposes, due diligence, or regulatory compliance requires attorney judgment about what is material and what the implications are for your specific client matter. Claude identifies what is present; the attorney determines what it means.
Keep approved working rules and precedent references outside any one chat
Add your practice area or matter type to fenbs as a project. Store your approved clause language references, research decisions, and practice rules as Decisions and rules. When the next AI session starts, those rules are already there — so the assistant does not operate from generic defaults when your firm has established specific approved approaches.
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Confidentiality and professional responsibility
Attorney-client privilege and the duty of confidentiality restrict what you can share about a client matter with third parties, including AI tools. Before using Claude on a client matter, check your bar's ethics guidance on AI and whether your firm has an approved protocol for AI use. The ABA has issued ethics opinions on AI in legal practice; many state bars have followed. These opinions are authoritative; this article is not.
Do not share client names, identifying facts, or confidential matter details with a consumer AI account. Use Claude for structural and research-orientation tasks where the client's confidential information is not required. For work that does require client-specific detail, check whether your firm's enterprise AI agreement with Anthropic or another provider covers the applicable confidentiality obligations.
The duty of competence under Model Rule 1.1 includes understanding the benefits and risks of technology relevant to legal practice. Using AI tools you do not understand, or relying on AI output without verification, is a competence issue, not just a quality issue.
Source links and research records
Legal research produces a trail of sources, rejected approaches, and governing decisions that the next person on the matter needs to understand. When you confirm a case is good law, note that in the matter record. When you decide a particular argument does not apply, record why. That trail prevents later sessions from redoing the same research or reexploring approaches the team already rejected.
Keep verified source links — not Claude's citations, but the actual Westlaw or official links to the cases you have confirmed — in the matter record in fenbs. When a colleague or a future session picks up the research, the verified sources are available rather than requiring a repeat of the verification step.
How to do this with fenbs
- Create a free account at fenbs. Add your practice area or matter type as a project. Keep client-specific matter projects separate from general practice projects; general practice rules are not confidential, matter details are.
- Write your practice area rules as Decisions and rules: verification requirements, approved clause sources, professional responsibility reminders. These appear first when a connected AI reads the project.
- Store confirmed source links — verified cases and statutes — as links in the project, separate from Claude's unverified suggestions.
- Connect Claude from Integrations. At the start of each research session, ask Claude to read the project context including the rules and existing confirmed sources.
- After each session, save progress: what was confirmed, what is still unverified, and the next research step.
When attorney oversight is required
Claude does not provide legal advice, and its output is not a substitute for attorney judgment. Every output that touches a client matter — research orientation, draft document, document summary — requires attorney review before it is relied upon or delivered. Supervisory rules under Model Rule 5.3 apply to AI-generated work product in the same way they apply to work by non-lawyer staff: the attorney responsible for the matter is responsible for the work product.