# unknown_actor

> The original caller of a held order can't be verified; nothing was sent.

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

HTTP 401. Nothing reached the broker.

**Likely cause:** The credential that sent it no longer exists.

**What to do:** Send the order again with a current credential.

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

Listed under [Pre-trade hooks, holds and kill switches](https://tickwire.io/docs/errors/#pre-trade-hooks-holds-and-kill-switches) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.