> [!WARNING]
>
> **Preview**
>
>
> This product or feature is
>
> subject to the "Pre-GA Offerings Terms" in the General Service Terms section
> of the [Service Specific
> Terms](https://docs.cloud.google.com/terms/service-terms#1).
>
> Pre-GA products and features are available "as is" and might have limited support.
>
> For more information, see the
> [launch stage descriptions](https://cloud.google.com/products/#product-launch-stages).

You can use a text message to opt out of receiving notifications sent by
using SMS notification channels. You can also use text messages to request
information about how to opt out.

You can send text messages in English or in French, as required for compliance
with US and Canadian regulations.

## Opt out of SMS-based notification

To opt out of SMS notifications, send one of the following messages as a
reply to the SMS notification:

- English: **STOP**
- French: **ARRET**

Cloud Monitoring disables all notification channels associated with the
phone number, **across all Google Cloud projects**, and sends a confirmation
SMS message.

## Request opt-out information

To request information about how to opt out of SMS notifications, send
one of the following messages as a response to the SMS notification:

- English: **HELP**
- French: **AIDE** or **INFO**

## Opt in to SMS-based notification

When you send a text message to opt out of receiving SMS notifications,
then the affected channels are disabled.
To start receiving SMS notifications again, edit the disabled notification
channels to enable them. For information about editing notification channels,
see the following:

- [Use the Google Cloud console](https://docs.cloud.google.com/monitoring/support/notification-options#edit-delete-channel)
- [Use the API](https://docs.cloud.google.com/monitoring/alerts/using-channels-api#api-update-channels)