---
title: "Credentials and authorization codes (table) | Veriff.com"
slug: "credentials-and-authorization-codes-table"
description: "Learn about credentials and authorization codes, including how they work to secure access and authenticate users in various systems and applications."
updated: 2024-09-10T12:38:14Z
published: 2024-09-10T12:38:14Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.veriff.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Credentials and authorization codes (table)

These codes are returned when the webhook or public API authorization fails.

| Code | Description |
| --- | --- |
| 1801 | Mandatory X-AUTH-CLIENT header containing the API key is missing from the request |
| 1802 | API key is not a valid UUID |
| 1803 | Integration with the API key was not found |
| 1804 | Integration with the API key is not active |
| 1812 | Signature is not a valid SHA256 hash |
| 1813 | Signature does not match the SHA256 hash of query ID and integration API secret |
| 1814 | Signature does not match the SHA256 hash of request body and integration API secret |
| 1818 | Signature does not match the HMAC-SHA256 of query ID and integration API secret |
| 1819 | Signature does not match the HMAC-SHA256 of request body and integration API secret |