Why is opt-in required to send notifications/template messages? Kauntal Patel February 09, 2022 11:03 Updated WhatsApp mandates that you get voluntary consent from your user to send them template notifications. Related articles What are the different kinds of users states? How do I opt-in users? How can I view and manage users? Can I opt-in or opt-out a user via API? How do I send a template message using the API? Comments 0 comments Please sign in to leave a comment.