> ## Documentation Index
> Fetch the complete documentation index at: https://yn-c9bb3266.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Update Onboarding

> Submit additional documentation or update an existing onboarding

## Path parameters

<ParamField path="entity_id" type="string" required>
  The entity identifier.
</ParamField>

<ParamField path="onboarding_id" type="string" required>
  The onboarding identifier.
</ParamField>

## Body

Use this endpoint to submit additional documentation when the onboarding status is `PENDING_ADDITIONAL_DOCUMENTATION`.

<ParamField body="documents" type="array">
  Array of documents to submit. Each document includes:

  * `type`. Document type (e.g., `PROOF_OF_ADDRESS`, `IDENTITY_DOCUMENT`)
  * `file_name`. Name of the file
  * `content_type`. MIME type (e.g., `image/jpeg`, `application/pdf`)
  * `content`. Base64-encoded file content
</ParamField>

## Response

Returns the updated onboarding object.

<ResponseExample>
  ```json 200 OK theme={"theme":{"light":"github-dark","dark":"github-dark"}}
  {
    "id": "onb_990e8400-e29b-41d4-a716-446655440000",
    "entity_id": "ent_660e8400-e29b-41d4-a716-446655440000",
    "yuno_account_id": "550e8400-e29b-41d4-a716-446655440000",
    "onboarding_type": "ONE_STEP",
    "status": "UNDER_REVIEW",
    "requirements": [],
    "created_at": "2026-02-01T10:00:00Z",
    "updated_at": "2026-02-02T09:00:00Z",
    "expires_at": "2026-02-08T10:00:00Z"
  }
  ```
</ResponseExample>