# Cancel an investigation

**POST** `/v1/investigations/{investigationId}/cancel`

**Operation ID**: `cancel_1`
**Summary**: Cancel an investigation
Durably marks an eligible investigation as CANCELLING and returns 202. An asynchronous reconciler cancels its workflow, if one exists, and it then finalizes as CANCELLED.

## Tags
- Investigations
## Parameters

- **investigationId** (required) - path
  - Type: string

## Responses

### 202

Cancel requested

### 401

Unauthorized

### 404

Investigation not found

### 409

Investigation is already finished