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

# Phase Changed

> Fired when a case transitions to a new phase.

This event fires when a case moves from one phase to the next in the arbitration process. Use it to trigger time-sensitive actions — like filing documents that are only allowed in certain phases, or notifying your team that a deadline window has opened.

## Phases

Cases progress through these phases in order:

| Phase ID | Name | What happens |
| - | - | - |
| `caseInitiation` | Case Initiation | Claimant creates the case and files their statement of claim. |
| `caseFiling` | Case Filing | Claimant pays the filing fee and initiates service of notice to the respondent. |
| `response` | Response | Respondent is given a window to join the case and submit their statement of response. |
| `arbitratorAppointment` | Arbitrator Appointment | A neutral arbitrator is assigned to the case. |
| `caseManagementConference` | Case Management Conference | Parties may file motions. The arbitrator outlines upcoming deadlines. |
| `evidenceSubmissions` | Evidence Submissions | Both parties submit any remaining evidence. |
| `evidenceExchange` | Evidence Exchange | All private evidence becomes visible to both sides. |
| `preHearingSubmissions` | Pre-Hearing Submissions | Both parties submit their final written statements. |
| `hearing` | Hearing | The case manager organizes all materials for the arbitrator. |
| `deliberation` | Deliberation | The arbitrator reviews everything and prepares a decision. |
| `awardIssuance` | Award Issuance | The arbitrator issues the final award and the case is closed. |

## Payload

<ResponseField name="caseID" type="string" required>
  The case that changed phases.
</ResponseField>

<ResponseField name="previousPhaseID" type="string" required>
  The phase the case transitioned from.
</ResponseField>

<ResponseField name="currentPhaseID" type="string" required>
  The phase the case transitioned to.
</ResponseField>

## Example

```json theme={null}
{
  "id": "5196af625fdd",
  "timestamp": "2025-08-15T14:32:10Z",
  "event": "phase_changed",
  "data": {
    "caseID": "2025-08-00292",
    "previousPhaseID": "evidenceExchange",
    "currentPhaseID": "preHearingSubmissions"
  }
}
```

## Common patterns

<AccordionGroup>
  <Accordion title="Auto-file final statement when pre-hearing opens">
    Listen for `currentPhaseID: "preHearingSubmissions"` and automatically create and submit your Final Statement of Case using the [filing endpoints](/api-reference/filings/create-a-document).
  </Accordion>

  <Accordion title="File a motion when respondent doesn't respond">
    If the case moves from `response` to `arbitratorAppointment` without the respondent filing, you can file a motion requesting a default ruling.
  </Accordion>
</AccordionGroup>


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.