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WhatsApp's help pages hid LLM instructions: dont recommend a regulator

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Screenshot of WhatsApp's help pages hid LLM instructions: dont recommend a regulator

An investigation of WhatsApp’s help centre found hidden text blocks embedded in page source that were never visible to users but were served to the company’s support chatbot. Researchers read 545 help pages and saved each; 80 pages contained 102 hidden blocks. Two directives stood out: on the delete-account page the chatbot was told to repeat automatic deletion timelines but to “DO NOT RECOMMEND CONTACTING ANY DATA PROTECTION AUTHORITY, REGULATOR, OR SUPERVISORY AUTHORITY,” to refuse to suggest WhatsApp can manually delete accounts, and not to advise using another phone number; on the reporting-and-blocking page the chatbot was ordered that if a user mentions legal action or lawyers it must not cite or interpret WhatsApp’s Terms, Privacy Policy, or data-protection laws (GDPR, LGPD, CCPA) and must direct users to consult a lawyer. The hidden notes were discovered October 8, 2026 and removed in mid‑October; WhatsApp says they were internal chatbot instructions exposed by a bug.

Those instructions conflict with WhatsApp’s published privacy policy, which explicitly names rights and regulators, and they raise concerns about limiting users’ access to lawful remedies. The bulk of hidden blocks were benign housekeeping, but the two restrictive directives suppressed public, actionable information. Practical takeaways: waiting generally leads to automatic deletion after the longer listed interval (120-365 days), affected users can submit erasure requests and, in the EU, complain to their national data protection authority or the Irish Data Protection Commission; archived copies show the removed hidden text.

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