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← Playbooks · Vendors & third parties

Co-counsel, e-discovery, or vendor breach

Someone else holding your client's data has had the incident. Your residual duty doesn't end at their door.

A third party holding the firm's client data (e-discovery host, co-counsel, expert, transcription, cloud backup, litigation-funding platform) has the incident.

The first hour

What to do, in order.

  1. 01

    Get the vendor's notice in writing with scope, timeline, and data classes affected.

  2. 02

    Identify which clients' matters were in scope.

  3. 03

    Confirm the vendor's contractual notification, indemnity, and cooperation obligations are being met.

  4. 04

    Coordinate client notification with the vendor — never let the vendor notify your client first.

Key decisions

The questions you'll be asked.

Who notifies the client — us or the vendor?
The firm. The relationship is with the firm, not the vendor; the firm controls the message and timing.

Regulatory & ethical hooks

What the rules say.

  • ABA Model Rule 5.3 — Non-lawyer assistance
  • ABA Formal Opinion 483
  • Vendor-specific contractual breach clauses (DPA, BAA)

Cited for orientation, not as legal advice. Your firm's ethics counsel and LPL carrier should be consulted on every specific incident.

Related playbooks

  • Vendors & third parties

    Practice-management or document-management vendor compromise

  • Compliance & aftermath

    Cyber insurance, LPL, and bar-counsel response

HackFirstAid for Law Firms

The first hour after an incident decides whether your firm keeps the client's money, the client's secrets, and the client's trust. We walk firms through it in plain language.

Advisory, training, and incident response — not legal advice. Reading this site creates no attorney-client relationship.

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