> ## Documentation Index
> Fetch the complete documentation index at: https://docs-payment-merchant.keysecure.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Card Status Change Notification

The platform sends a POST request to the configured merchant callback URL when a card's status changes.

## Trigger Scenarios

* Card status has changed.

## Push Parameters

<ParamField body="id" type="string" required>
  Push ID.
</ParamField>

<ParamField body="action" type="string" required>
  Push action, see \[Appendix - Constants] Push Actions.
</ParamField>

<ParamField body="data" type="object" required>
  Push data.
</ParamField>

### data Fields

<ResponseField name="card_no" type="string">Card order number</ResponseField>
<ResponseField name="before_status" type="string">Status before change, see \[Appendix - Constants] Card Status</ResponseField>
<ResponseField name="after_status" type="string">Status after change, see \[Appendix - Constants] Card Status</ResponseField>
<ResponseField name="reason" type="string">Reason for change</ResponseField>
<ResponseField name="time" type="number">Change time (Unix milliseconds)</ResponseField>

<RequestExample>
  ```json Request theme={null}
  {
    "id": "",
    "action": "",
    "data": {
      "card_no": "",
      "before_status": "",
      "after_status": "",
      "reason": "",
      "time": 0
    }
  }
  ```
</RequestExample>

## Merchant Response

<ResponseField name="code" type="number" required>
  Response code. `0` indicates success.
</ResponseField>

<ResponseField name="message" type="string">
  Failure reason, required when failing.
</ResponseField>

<ResponseExample>
  ```json Response theme={null}
  {
    "code": 0,
    "message": ""
  }
  ```
</ResponseExample>