Third-party channel requirements
Required language elements:
“receive [noun], [logo and name], on [number]"
Where noun is type of information related to the flow.
User must be asked to opt-in via a visual element (checkbox or similar) shown next to the WhatsApp name and logo on your chosen third party channel. The user should have control over what number is used through explicit action (e.g., editing). In addition, language must be shown adjacent to the UI elements to explain clearly what information will be received and make specific reference to this information being sent as messages on WhatsApp.