# Deregister a Callback Listener: ## DELETE /callbacks/{account}/name/Fota Deregisters the callback endpoint and stops ThingSpace from sending FOTA callback messages for the specified account. ## Request Components #### HTTP Request #### `DELETE https://thingspace.verizon.com/api/fota/v1/callbacks/{account}/name/Fota` ## Resource and Query Parameters You must include the name of the account and the name of the callback service (“Fota”) in the path. | Parameter Name | Data Type | Description | |-----|-----|-----| | **account** *(required)* | string | The name of the billing account that is registered to receive callback messages. An account name is usually numeric, and must include any leading zeros. | ## Header Parameters The request header must set the `content-type` to JSON, contain a current ThingSpace authorization token and a current VZ-M2M session token. For more details on how to get these tokens, visit [Getting Started](https://thingspace.verizon.com/documentation/api-documentation.html#/http/session-management/guides/getting-started). | Parameter Name | Data Type | Description | |-----|-----|-----| | **Authorization** *(required)* | string | HTTP Authorization bearer token: `Authorization: Bearer {token}` | | **VZ-M2M-Token** *(required)* | string | A valid session token: `VZ-M2M-Token: {M2Mtoken}` | | **Content-Type** *(required)* | string | Must be application/json `Content-Type: application/json` | ## Request Body None. ## Success Responses **Status 200** A response to a successful request contains a single Boolean value: ```json { "success": true } ``` ## Failure Responses **Status 400** All error messages are returned in this format: ```json { "errorCode": "error code string", "errorMessage": "error message string" } ``` Error codes and messages are listed on the [Error Messages](https://thingspace.verizon.com/documentation/api-documentation.html#/http/software-management/guides/error-messages) page, along with explanations and suggestions for corrective actions.