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

# Reference

> Error code mappings between Onfido and Grand Central for troubleshooting

The Onfido integration verifies customer identities through document and biometric checks, creating users, starting verification workflows, and returning the identity verification (IDV) outcome. For setup steps, see [Get started](/connectors/kyc-kyb/onfido/get-started).

## Supported operations

The Onfido connector supports the following operations.

### User creation and workflow initiation

* Create a user ID
* Initiate relevant workflow

### Workflow results (Pull)

* Get IDV process outcome
* Get all data points details associated to the decision

### Document download

* Download all documents generated during the IDV process (ie: IDV process reports, face scan movie, document scan images...)

## Events

* The Onfido connector includes inbound webhook support for receiving real-time identity and verification workflow results.

* **Webhook events:** Receive real-time notifications from Onfido when an IDV workflow result is available. Grand Central supports the following Onfido event by default.

| Onfido event             | Output                                                                                             |
| :----------------------- | :------------------------------------------------------------------------------------------------- |
| `workflow_run.completed` | Transformed IDV result with workflow status, applicant ID, workflow output, and decision metadata. |

## Error mapping

The following table maps each Onfido error code to its Grand Central counterpart:

| Onfido code                                | Grand Central code |
| :----------------------------------------- | :----------------- |
| `resource_not_found`                       | `GC054`            |
| `validation_error`                         | `GC205`            |
| `authorization_error`                      | `GC002`            |
| `expired_token`                            | `GC002`            |
| `user_authorization_error`                 | `GC002`            |
| `account_disabled`                         | `GC004`            |
| `disabled_endpoint`                        | `GC004`            |
| `trial_limits_reached`                     | `GC004`            |
| `bad_referrer`                             | `GC005`            |
| `gone`                                     | `GC006`            |
| `incorrect_base_url`                       | `GC021`            |
| `bad_request`                              | `GC025`            |
| `check_type_deprecated`                    | `GC025`            |
| `deprecated_reports`                       | `GC025`            |
| `disabled_reports`                         | `GC025`            |
| `document_ids_with_unsupported_report`     | `GC025`            |
| `facial_similarity_photo_without_document` | `GC025`            |
| `facial_similarity_video_not_supported`    | `GC025`            |
| `failed_check_requirements`                | `GC025`            |
| `incomplete_checks`                        | `GC025`            |
| `invalid_reports_names`                    | `GC025`            |
| `missing_applicant_location`               | `GC025`            |
| `missing_applicant_provided_consents`      | `GC025`            |
| `missing_billing_info`                     | `GC025`            |
| `missing_documents`                        | `GC025`            |
| `missing_id_numbers`                       | `GC025`            |
| `rate_limit`                               | `GC025`            |
| `report_names_blank`                       | `GC025`            |
| `report_names_format`                      | `GC025`            |
| `too_many_checks`                          | `GC025`            |
| `internal_server_error`                    | `GC027`            |

<Info>
  For a complete list of Grand Central error codes and their descriptions, see [Status codes, errors, and responses](/connectors/reference/error-codes).
</Info>