Claude for Lawyers: Source-Based Drafting and Human Review

Claude can help lawyers research legal questions, compare documents and draft sections of agreements, but every output needs attorney review and verification against authoritative sources. AI-generated legal analysis must never go to a client or a court without a lawyer confirming it is accurate, current and applicable. Tools like fenbs store firm-approved procedures and review tasks so each matter starts from the correct process rather than a remembered version of it.

What lawyers use Claude for

The most defensible uses are tasks where a lawyer checks the output against a primary source before relying on it: generating a first draft of a clause, summarizing the issues in a long document, identifying the key differences between two contract versions, or producing a research outline that the attorney then verifies through Westlaw, Lexis or the relevant primary authority.

Claude can also help with writing that supports legal work but does not itself constitute legal advice: internal memos summarizing a meeting, draft email responses for attorney review, plain-language explanations of a legal concept for a client letter, or checklists for a due diligence workstream. These are valuable uses that free up time for higher-judgment work.

• Drafting initial versions of standard clauses or agreement sections.
• Summarizing the key issues in a long contract or regulatory document.
• Comparing two versions of an agreement to identify meaningful differences.
• Generating a research outline or issue checklist for an attorney to verify.
• Drafting internal memos, client update letters and due diligence summaries.
• Preparing plain-language explanations of legal concepts for client communications.

Legal research support

Claude can outline the legal framework for a research question, identify the relevant doctrines and suggest the authorities a lawyer should check. That kind of starting structure is genuinely useful when you are beginning research in an unfamiliar area. It gets you to the relevant Restatement section, statute or line of cases faster than starting from scratch.

What Claude cannot reliably do is cite cases accurately. AI models have produced fabricated citations in legal contexts, including citations to cases that do not exist. Never submit a Claude-generated case citation without verifying it in Westlaw, Lexis or the court's own database. This applies whether you are submitting to a court, sending to opposing counsel or advising a client.

Use Claude to build the framework, then fill the framework with authorities you have verified yourself. That workflow is faster than doing it entirely from scratch and safer than treating Claude's output as a finished research memo.

Document review and comparison

For document comparison, paste both versions and ask Claude to identify the differences, with a focus on provisions that change meaning, add obligations or remove protections. Review its output against the documents directly: Claude can miss a change or describe a difference in a way that understates its significance.

For summarizing a long contract or regulatory filing, give Claude the document and ask for a summary of the key provisions, any unusual terms and the main obligations on each party. Verify the summary against the document before you rely on it for a client recommendation or an internal decision.

Redline review, confidentiality agreement analysis and due diligence checklists are all areas where Claude can provide a starting structure. The lawyer's job is to check whether that structure is complete and accurate for the specific matter, not to accept it as final.

Drafting with checked authorities

When drafting a clause, describe the commercial outcome you want, the jurisdiction and any constraints (governing law, required form, specific standard to avoid). Claude will produce a draft that you then review for accuracy, completeness and fit with the rest of the agreement. Treat it as a first draft from a junior associate: useful as a starting point, requiring careful review.

For jurisdiction-specific issues, always verify the applicable law independently. Contract law, employment law, regulatory requirements and procedural rules vary significantly across states. A clause that works in Delaware may need material changes in California. Claude does not always flag these differences, and the lawyer is responsible for the jurisdictional accuracy of any document that goes out.

Confidentiality and professional responsibility limits

The ABA Model Rules require lawyers to protect client confidences. Before entering any client information into Claude or any AI tool, check whether your firm has approved that tool for use with client matter information. Many firms have specific policies about which AI services may be used with confidential information, and those policies exist for good reasons.

In practice, this means using Claude with anonymized or hypothetical facts unless your firm has approved it for client-specific work. Describe the legal issue without the client name, the business context without identifying details, or the contract structure without the parties. The legal analysis is often just as useful and no confidential information is at risk.

ABA Formal Opinion 512 (2023) addresses the use of generative AI tools in legal practice. Check your state bar's guidance as well, since state rules vary. The core duty of competence means understanding enough about the tool you are using to supervise its output responsibly.

Firm-approved procedures and review tasks

Every firm has procedures: the review checklist for a contract type, the sign-off requirement before sending a draft to a client, the partner who must approve a particular kind of advice. When those procedures live only in the memory of the person who established them, a junior attorney or a new hire works from an incomplete picture. A procedure recorded with its reasoning is more reliable than one that has to be remembered.

In fenbs, Decisions and rules appear first in every AI context. A connected assistant reads the firm's standing review requirements before it helps with any drafting task, so the output is more likely to meet the firm's standards from the start rather than requiring correction after review.

How to use Claude for legal work with fenbs

Set up a project for each matter type or practice area. Add the standing review requirements, the key steps in your typical workflow, and any matter-specific rules. Connect Claude and ask it to read that context before starting any drafting or research task.

1. Create a free account. Start on your personal kanban board. Add a project for a matter type or practice area you are working on.
2. Record standing firm procedures and review requirements as Decisions and rules: review sign-off steps, confidentiality requirements, jurisdiction-specific checklists.
3. Add tasks for the current work: drafting sections, research questions to verify, review steps to complete before sending a document out.
4. Connect Claude over MCP from Integrations. Ask it to read the project context and review requirements before it helps with any drafting or research task.
5. When you send a draft for review or complete a research step, record what was done and what remains. The next session picks up from the current task rather than reconstructing what happened.

fenbs does not store client documents or case files. It stores the process, review requirements and task progress that help a matter move forward without procedural gaps.