---
title: Tip: after Anthropic's customer notice, ignore out-of-band "security" or billing asks that want passwords, OTPs or payment details | ctxsec
url: https://ctxsec.com/items/tip-anthropic-phishing-after-customer-notice-nov-7
description: "The notice itself flags phishing that spoofs Anthropic using exposed contact and plan details. Confirm any account change only inside your signed-in Claude console or with a known account manager."
status: "operational guidance (Anthropic customer notice via Byline Network, Nov 7)"
published: 2026-11-07
---

> The notice itself flags phishing that spoofs Anthropic using exposed contact and plan details. Confirm any account change only inside your signed-in Claude console or with a known account manager.

[← Tips & Guides](/tips) · [markdown](/items/tip-anthropic-phishing-after-customer-notice-nov-7.md)

operational guidance (Anthropic customer notice via Byline Network, Nov 7)

2026-11-07

### Tip: after Anthropic's customer notice, ignore out-of-band "security" or billing asks that want passwords, OTPs or payment details

- Do not click password-reset or "verify billing" links from unexpected Anthropic-branded email.
- Enterprise admins: remind finance and IT that plan tier and spend figures may now be known to a third party and are useful social-engineering bait.

Sources: [Byline Network: Anthropic notice summary (Nov 7)](https://byline.network/2026/11/7-521/)