Checkout Options
Enable phone number validation on checkout – this option is only available when using Vonage (formally Nexmo) and Twillio
Require Customers to Opt-in – enable this option to send order SMS notifications only to customers that opted-in to receive SMS notifications. disabling this option will send SMS messages to all your customers.
When the “Require Customers to Opt-in” option is enabled, the following options will be visible:
- Opt-in Checkbox Checked by Default
- Opt-in Label – customize label to display to customer on checkout page
- Opt-in Location – choose the placement of opt-in label on checkout page

The Checkout Experience
In this example, the SMS opt-in option is enabled and the phone number validation is enabled (only available for Twilio and Nexmo) – The customers entered a non valid phone number:

In this example, the SMS opt-in option is enabled and the phone number validation is enabled (only available for Twilio and Nexmo) – The customers entered a valid phone number:

Post-Checkout Opt-in
If a customer is opted-in for SMS notifications and wants to opt-out, the customer can do so from the Order Confirmation page and View Order page.

