WhatsApp is introducing Usernames and a new backend identifier – the Business Scoped User ID (BSUID) – that will replace phone numbers for users who adopt usernames on the WhatsApp Business Platform. Vidhur Voora (Business Engineer) and Leonardo De Castro Monteiro (Partner Engineer) explain how to update your webhook parsing logic and API requests to handle BSUIDs, the 30-day phone number visibility rule, and new tools like the contact book service and REQUEST_CONTACT_INFO button.
