---
agentTools:
  projectIndex: https://developer.bill.com/llms.txt
---

# Card account webhook improvements

The `card-account.updated` webhook notification now includes the `id` field.

| Field | Description                                                         |
| :---- | :------------------------------------------------------------------ |
| `id`  | BILL-generated ID of the card account. The value begins with `cat`. |

See [Card account notification payloads](https://developer.bill.com/docs/card-account-notification-payloads) for more information.