---
title: "Draft an outside-counsel brief and check an invoice against the engagement"
url: "https://ailawframework.com/practice/in-house-general-counsel/draft-an-external-counsel-brief-and-an-invoice-check-against-the-engagem/united-states"
type: "task_jurisdiction_version"
site: "AI Law Framework"
id: "A40-T1-R10-US"
practice_area: "In-House / General Counsel"
tier: "yellow"
lawyer_review: "required"
jurisdictions: ["US"]
last_reviewed: "2026-10-22"
---

# Draft an outside-counsel brief and check an invoice against the engagement

> From the facts and questions the lawyer lists, assemble a brief that states the question, the documents to be sent, and the budget the lawyer has set.…

Canonical page: https://ailawframework.com/practice/in-house-general-counsel/draft-an-external-counsel-brief-and-an-invoice-check-against-the-engagem/united-states  
Last reviewed: 2026-10-22

Site index for agents: https://ailawframework.com/llms.txt

## Key facts

| Fact | Value |
| --- | --- |
| Practice area | [In-House / General Counsel](https://ailawframework.com/practice/in-house-general-counsel.md) |
| Human involvement | Yellow: Lawyer and AI draft together |
| How AI is used | From the facts and questions the lawyer lists, assemble a brief that states the question, the documents to be sent, and the budget the lawyer has set. Compare each invoice line with the engagement terms the lawyer supplies and flag a line that does not match. Do not send the brief and do not approve an invoice. |
| What the lawyer must review | Sending a brief to outside counsel discloses information relating to the representation. ABA Model Rule 1.6(a) provides that a lawyer shall not reveal that information unless the client gives informed consent, the disclosure is impliedly authorized in order to carry out the representation, or paragraph (b) permits it. The lawyer decides what is included and whether the engagement authorizes the disclosure. ABA Model Rule 1.1 requires competence in the brief and in the check of the invoice. The fee arrangement is the engagement the client and the outside counsel made. The tool compares lines with that document. It does not decide that a charge is reasonable and it does not approve payment. ABA Formal Opinion 512 leaves the lawyer responsible for the draft. |
| Written for | United States |
| Applies to | [Draft an external-counsel brief and an invoice check against the engagement](https://ailawframework.com/practice/in-house-general-counsel/draft-an-external-counsel-brief-and-an-invoice-check-against-the-engagem.md) |

## Checking plan

- What the AI does: From the facts and questions the lawyer lists, assemble a brief that states the question, the documents to be sent, and the budget the lawyer has set. Compare each invoice line with the engagement terms the lawyer supplies and flag a line that does not match. Do not send the brief and do not approve an invoice.
- Basis: Checked against the linked sources on 22 October 2026. Confirm the current instrument before reliance.

## Notes

- A mismatch between an invoice line and the engagement is a flag for the lawyer. It is not a decision to refuse payment.
- Do not put the client's documents into a public tool in order to write the brief.

## Sources

- [ABA Model Rule 1.6, Confidentiality of Information](https://www.americanbar.org/groups/professional_responsibility/publications/model_rules_of_professional_conduct/rule_1_6_confidentiality_of_information/) (checked 2026-10-22)
- [ABA Model Rule 1.1, Competence](https://www.americanbar.org/groups/professional_responsibility/publications/model_rules_of_professional_conduct/rule_1_1_competence/) (checked 2026-10-22)

## Forms and precedents for this task

| Form or precedent | Kind | AI level | Summary |
| --- | --- | --- | --- |
| [Outside-counsel guidelines on generative AI (United States)](https://ailawframework.com/precedents/in-house-general-counsel/us-outside-counsel-generative-ai-guidelines.md) | Letter | Yellow | Instructions from a client to outside counsel on generative AI: when counsel must say a tool was used, what must not be input, how AI-assisted time is billed, and that a lawyer reviews anything filed. |
| [Instruction letter and terms of engagement for external lawyers (in-house client, including AI use and billing rules)](https://ailawframework.com/precedents/in-house-general-counsel/external-counsel-instruction-letter-and-terms.md) | Letter | Yellow | A letter from an in-house legal team instructing an external law firm on one matter: scope, who gives instructions, team, estimate and cap, billing rules, privilege handling, data security, the… |

Signed-in accounts can read the full text of each one.

*Practice guidance for planning and review. Confirm current primary sources and the requirements of the actual matter. This is general information, not legal advice.*