> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/commerce-api-references/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/commerce-api-references/warnings-and-error-codes/error-codes/error-codes-for-shopper-apis/403-forbidden.md).

# 403 Forbidden

Understand the 403 Forbidden error codes for the Shopper APIs.

The `403 Forbidden` error code is an HTTP status code that indicates that the server understands the request but refuses to authorize it. As a result, the server forbids access to the requested resource for some reason. This error can occur for various reasons, including but not limited to the user not having the necessary permissions. Rules may block the request or deny access to the requested resource. Understanding and resolving the underlying cause is essential for gaining access.

## `forbidden`

The system cannot complete the request, as the call is prohibited.

## `resource-duplicated`

When you encounter the `resource-duplicated` error code means an attempt to create or update an offer with an external reference ID already used for another offer on the platform. Each offer must have a unique external reference ID.

### `access-denied`

* `invalid-operation`\
  You do not have permission to perform this operation.