# # NotificationChannel
Representing a notification channel for sending messages.

```php
use Xendit\Invoice\NotificationChannel;
```


    ## Enum

    
        * `EMAIL` (value: `'email'`)
    
        * `SMS` (value: `'sms'`)
    
        * `WHATSAPP` (value: `'whatsapp'`)
    
        * `VIBER` (value: `'viber'`)
    
        * `XENDIT_ENUM_DEFAULT_FALLBACK` (value: `UNKNOWN_ENUM_VALUE`)

If you encounter `UNKNOWN_ENUM_VALUE`, it means that this ENUM is unavailable in your current SDK version. Please upgrade to get the newest ENUM.

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