---
title: "Signature expired — Anis Developers"
description: "Reserved. Anis does not send this code today: a signature that is too old, or signed on a clock that is out, is answered `invalid_credentials` — on purpose, so a refusal never says which part of a signature failed."
url: https://developers.anis.ly/errors/signature-expired/
language: en
---

> Every page of this documentation: https://developers.anis.ly/llms.txt

[Error codes](https://developers.anis.ly/errors.md) · Keys and signatures

# Signature expired

- **Code:** `signature_expired`
- **Status:** 401
- **If this was an order:** This request bought nothing
- **Send it again unchanged?** Yes — see What to do
- **.NET SDK:** `InvalidCredentialsException`

## What it means

Reserved. Anis does not send this code today: a signature that is too old, or signed on a clock that is out, is answered `invalid_credentials` — on purpose, so a refusal never says which part of a signature failed.

## What to do

- Handle it like [`invalid_credentials`](https://developers.anis.ly/errors/invalid-credentials.md) if you ever receive it.
- Keep your server clock synchronised (NTP), and sign every attempt afresh.

## Example

The body of the refusal. Its `type` is the address of this page.

```
{
  "type": "https://developers.anis.ly/errors/signature-expired",
  "title": "Signature expired",
  "status": 401,
  "code": "signature_expired",
  "requestId": "01J9R2K8T4V6XQ0M3B7C5D9E1F"
}
```