How are STOP requests handled on the Alerts pre-approved shortcode?

If a user texts STOP to one of your messages (or end, quit, cancel, unsubscribe), Nexmo will manage the opt out by blacklisting the number and sending the STOP MT you created in your application. If you have a webhook URL set up, Nexmo will send you the STOP MO as it is received. 

For more information on how unsubscribe requests are handled and how you can manage them, please visit https://developer.nexmo.com/api/sms/us-short-codes/alerts/subscription

 

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