WhatsApp Usernames
summary
WhatsApp adds a Business Scoped User ID (BSUID) that appears in webhooks since early April 2026 and always replaces or accompanies phone-based WA IDs; BSUIDs are backend, portfolio-scoped IDs that start with a two-letter country code followed by a dot and can be up to 128 chars. Phone numbers are withheld unless stored in the contact book or seen within a 30-day phone number window. New tools: contact book, REQUEST_CONTACT_INFO button, and a recipient parameter in the API to send to BSUIDs.
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chapters (10)
- 0:00Introduction to updates
- 0:54Rationale behind the changes
- 2:28Understanding BSUIDs
- 3:58Webhook and API migration
- 8:43API integration updates
- 10:02Transition tools
- 15:00Parent BSUIDs
- 15:48Business usernames
- 16:57Timeline and checklist
- 18:25FAQ and closing steps
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