# topic_locked

> This kind of email can not be turned off.

Source: https://tickwire.io/docs/errors/topic_locked/

HTTP 400.

**Likely cause:** Turning off the billing or security topic in the email notification settings.

**What to do:** Leave it on. Billing and security emails are always sent.

**Retry:** No. The same request gets the same answer; change something first.

Listed under [Sign-in and organisations](https://tickwire.io/docs/errors/#sign-in-and-organisations) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.