When creating a sign-up form, you can choose the 'form to sign-up' option, which asks users to enter their email address or phone number in order to subscribe to Email, SMS, or WhatsApp, and to be added to a specific list.

Lists are set up to require either single consent or double consent. If you set up a list to require double consent, customers will need to perform an additional step before they are subscribed and added to th specified list.

Single consent

If the list you are using is set up for single consent only, then customers will be marked as 'subscribed' as soon as they submit their email address or phone number, and will be added to the specified list.

Double consent

If the list you are using is set up for double consent, then customers will be sent an email, SMS, or WhatsApp message as soon as they submit their email address or phone number.

This message will ask the customer to confirm that they want to subscribe on that channel.

The customer must reply to that message to confirm that they want to subscribe. They will only be subscribed and added to the specified list if they reply with confirmation.