templateId in Direct Send delivery receipts

WhatsApp delivery receipts now include a templateId field for messages sent via the WhatsApp Direct Send API, so you can correlate a receipt back to the exact template that was delivered.

templateId (string) is the template ID WhatsApp used to deliver the message. It appears inside the whatsapp object of the delivery receipt and is only present for messages sent through the Direct Send API:

"whatsapp": {
  "pricingCategory": "marketing",
  "templateId": "1281032340757288"
}

The field is documented in the WhatsApp object table alongside providerErrorCode and pricingCategory, and shown in the delivery-receipt examples (template with image header and buttons, interactive list message, and so on).

See Delivery receipts for outbound Chat Apps.