WhatsApp messages are now routinely produced in litigation as evidence. The WhatsApp Business API version — which routes messages through Meta's servers — has different evidentiary and preservation characteristics than personal WhatsApp. Law firms using the WhatsApp AI agent need to understand both.
Key Analysis
WhatsApp Business API messages transit Meta\'s servers and are stored there temporarily — this affects both E2E encryption claims and third-party subpoena exposure.
Law firms have a duty to preserve client communications relevant to litigation. If those communications happen on WhatsApp, the duty extends to WhatsApp records — including the WhatsApp AI agent relay logs.
Admissibility of WhatsApp messages as evidence has been addressed in courts across India, the UK, and the US — generally affirmatively, but with authentication requirements.
Risk Signals
No preservation policy for WhatsApp communications relevant to pending or anticipated litigation.
Meta subpoena risk not addressed in client communications policies.
Law firm assuming E2E encryption applies when using the Business API.
Action Items
Implement a litigation hold workflow that freezes WhatsApp conversation records when litigation is anticipated.
Discuss the non-E2E-encrypted nature of Business API communications in client engagement letters.
Maintain local copies of all WhatsApp communications relevant to client matters — do not rely on Meta retention.