Drafting Client Emails and Engagement Letters with Claude

Engagement letters and client emails are where a lot of lawyer time quietly disappears — not because the content is hard, but because getting the tone right takes longer than it should. Too formal and the client feels talked down to; too casual and it doesn't read as professional advice they're paying for. Claude is genuinely good at hitting that middle register, once you give it the right constraints.

Engagement letters: keep Claude on a short leash

An engagement letter is a contract, so I never let Claude generate the substantive terms — scope, fees, termination clauses — from scratch. What it's excellent for is taking your firm's existing template and adapting the plain-English scope description to a specific matter, or checking a draft for ambiguous language before it goes out.

Here is our firm's standard engagement letter template and a description of the new matter it needs to cover:

Template:
[paste template]

Matter description:
[describe the matter]

Adapt the 'Scope of Representation' section only. Do not alter fee structure, termination, or liability language. Flag anything in the scope description that seems too broad or too narrow given the matter described.

Restricting Claude to one section at a time, with an explicit instruction not to touch the rest, keeps the risk contained to the part you're actually asking it to help with.

Client emails: the tone problem, solved

For day-to-day client correspondence, the highest-value use is translating an internal case note or a rough draft into something client-ready. The prompt below has become my default:

Turn this into a client email. Requirements:
- Plain English, no unexplained legal terms
- Warm but professional tone, not overly casual
- Lead with the bottom line, then explain
- End with one clear next step and a specific timeframe
- Keep it under 200 words unless the substance genuinely requires more

Internal note:
[paste note]

A habit worth building: the second pass

I always run a second, separate prompt on anything client-facing before it goes out: "Read this as if you were an anxious client with no legal background. What would confuse you, and what would worry you unnecessarily?" It catches things a lawyer's eye skips right over, because we've stopped noticing our own jargon.

The goal isn't to make Claude write your client relationships for you. It's to remove the friction between having the right answer and getting it into a message that actually lands the way you mean it to.