> For the complete documentation index, see [llms.txt](https://api.senderwiz.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://api.senderwiz.com/customer/subscribers/unsubscribe-a-subscriber-by-email.md).

# Unsubscribe a Subscriber by Email

### 📧 Unsubscribe a Subscriber by Email

Locate a subscriber via email and unsubscribe them from the list silently.

***

#### 🔹 HTTP Requests

**Step 1: Search by email**

```http
GET API-URL/lists/LIST-UNIQUE-ID/subscribers/search-by-email
```

**Step 2: Unsubscribe by subscriber UID**

```http
PUT API-URL/lists/LIST-UNIQUE-ID/subscribers/SUBSCRIBER-UNIQUE-ID/unsubscribe
```

***

#### 🔸 URL Segments

| Segment                | Required | Description                                     |
| ---------------------- | -------- | ----------------------------------------------- |
| `LIST-UNIQUE-ID`       | Yes      | List unique ID to which the subscriber belongs. |
| `SUBSCRIBER-UNIQUE-ID` | Yes      | Subscriber unique ID to unsubscribe.            |

***

#### 🔎 Query Parameters

| Parameter | Required | Description                      |
| --------- | -------- | -------------------------------- |
| `EMAIL`   | Yes      | Email address of the subscriber. |

***

#### 🔐 Authorization Header

```
X-API-KEY: your-api-key-here
```

***

#### 💻 PHP Example

```php
// UNSUBSCRIBE existing subscriber by email address, no email is sent, unsubscribe is silent
$response = $endpoint->unsubscribeByEmail('LIST-UNIQUE-ID', 'olivia.king@demo.io');

// DISPLAY RESPONSE
echo '<hr /><pre>';
print_r($response->body);
echo '</pre>';
```

***

#### 📦 Sample JSON Response

```json
{
  "status": "success"
}
```