# Delete USMS Signature - DeleteUSMSSignature

## Overview

Invoke the DeleteUSMSSignature interface to delete the SMS signature



 > ℹ️ 1. Deleting SMS signatures under review is not supported; 2. Once the SMS signature is deleted, it cannot be recovered. Please proceed with caution.


## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `DeleteUSMSSignature`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.genesissai.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **ProjectId** | string | Project ID, if not filled in, the default project will be used. Sub-accounts must be filled in. Please refer to the [GetProjectList interface](api/summary/get_project_list). |**Yes**|
| **SigIds.N** | string | Signature ID (also known as the work order ID when applying for a text message signature), supports being passed in as an array, for example, in the form of SigIds.0, SigIds.1...SigIds.N. |**Yes**|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|




## Example

### Request Example
    
```
https://api.genesissai.com/?Action=DeleteUSMSSignature
&ProjectId=org-bxxxxy
&SigIds.0=SIG20190XXX2C1844
&SigIds.1=SIG20190XXX3C1844
```

### Response Example
    
```json
{
  "Action": "DeleteUSMSSignatureResponse",
  "Message": "",
  "RetCode": 0
}
```