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

# Forget Fact

> Mark a fact as forgotten without deleting it

```
POST /openapi/memorylake/api/v3/workspaces/{workspaceId}/projects/{projectId}/memories/facts/{factId}/forget
```

Marks a fact as forgotten (expired) without permanently deleting it. The fact remains available for audit purposes but is excluded from future retrievals and searches. To forget multiple facts at once, use [Batch Forget Facts](/features/memorylake/api-reference/facts/batch-forget-facts).

<Note>
  **Permission required:** `project:mem_delete`
</Note>

### Path Parameters

<ParamField path="workspaceId" type="string" required>
  Workspace ID
</ParamField>

<ParamField path="projectId" type="string" required>
  Project ID
</ParamField>

<ParamField path="factId" type="string" required>
  Fact ID to forget
</ParamField>

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST 'https://app.memorylake.ai/openapi/memorylake/api/v3/workspaces/ws_abc123def456/projects/proj_a1b2c3d4e5f6/memories/facts/fact_8f3a1b2c4d5e/forget' \
    -H 'Authorization: Bearer sk_xxxxxx'
  ```
</RequestExample>

### Response

Returns an empty `data` object on success.

<ResponseExample>
  ```json Success (200) theme={null}
  {
    "success": true,
    "data": {}
  }
  ```
</ResponseExample>