> For the complete documentation index, see [llms.txt](https://fusionauth.io/docs/llms.txt)

# Delete a User Registration

API documentation for the FusionAuth Delete a User Registration API.

# Delete a User Registration

This API is used to delete a single User Registration.

## Request

[!API Key Authentication](https://fusionauth.io/docs/apis/authentication.md#api-key-authentication)

Delete a User Registration by providing the User Id and the Application Id

DELETE/api/user/registration/{userId}/{applicationId}

OpenAPI Spec

### Request Parameters

`applicationId`UUIDrequired

The Id of the Application for which the User will no longer be registered.

`userId`UUIDrequired

The Id of the User whose registration is being removed.

#### Request Headers

`X-FusionAuth-TenantId`Stringoptional

The unique Id of the tenant used to scope this API request.

The tenant Id is not required on this request even when more than one tenant has been configured because the tenant can be identified based upon the request parameters or it is otherwise not required.

Specify a tenant Id on this request when you want to ensure the request is scoped to a specific tenant. The tenant Id may be provided through this header or by using a tenant locked API key to achieve the same result.

See [Making an API request using a Tenant Id](https://fusionauth.io/docs/apis/authentication.md#making-an-api-request-using-a-tenant-id) for additional information.

## Response

The response for this API does not contain a body. It only contains one of the status codes listed below.

*Response Codes*

| Code | Description |
| --- | --- |
| 200 | The request was successful. |
| 400 | The request was invalid and/or malformed. The response will contain an [Errors](https://fusionauth.io/docs/apis/errors.md) JSON Object with the specific errors. This status will also be returned if a paid FusionAuth license is required and is not present. |
| 401 | You did not supply a valid Authorization header. The header was omitted or your API key was not valid. The response will be empty. See [Authentication](https://fusionauth.io/docs/apis/authentication.md). |
| 404 | The object you requested doesn't exist. The response will be empty. |
| 500 | There was an internal error. A stack trace is provided and logged in the FusionAuth log files. The response will be empty. |
| 503 | The search index is not available or encountered an exception so the request cannot be completed. The response will contain a JSON body. |