> For the complete documentation index, see [llms.txt](https://fusionauth.io/docs/llms.txt)

# Id Duplicate Create | FusionAuth Docs

Learn about the User Login Id Duplicate Create event.

# Id Duplicate Create

[Edit on GitHub](https://github.com/FusionAuth/fusionauth-site/blob/main/astro/src/content/docs/extend/events-and-webhooks/events/user/login/user-login-id-duplicate-create.mdx)

[View Markdown](https://fusionauth.io/docs/extend/events-and-webhooks/events/user/login/user-login-id-duplicate-create.md)

## User Login Id Duplicate Create

This feature is only available in the Enterprise plan. To learn more, see [our pricing page](https://fusionauth.io/pricing.md).

This event has been available since 1.30.0

This event is generated when a request to create a user with a login Id (email or username) which is already in use has been received.

Event type

user.loginId.duplicate.create

### Event Scope

Prior to version `1.37.0` this was a tenant or application scoped event. It can be sent to all applications or to one or more specified applications.

The ability to limit the generation of an event for only certain applications is legacy functionality and is removed as of version `1.37.0`. In earlier versions, you almost certainly want to enable this event at the tenant level and optionally filter on the **tenantId** when consuming the event.

In version `1.37.0` and later this is a tenant scoped event. It can be sent to all tenants or to one or more specified tenants. Those tenants will only be sent events related to their tenant. You can optionally also filter on the \*\*applicationId\*\* when consuming the event.

### Transaction Compatibility

This event is non-transactional. The operation will succeed regardless of the webhook response status code.

### Event Body

`event.createInstant`Long

The [instant](https://fusionauth.io/docs/reference/data-types.md#instants) that the event was generated.

`event.duplicateEmail`String

The email address that is already in-use.

`event.duplicateIdentities`Array<Object>Available since 1.59.0

List of identities that are already in-use. Identity objects contain a **type** and a **value** property. The **type** is the type of identity (e.g., email, phoneNumber, username) and the **value** is the actual value of that identity.

`event.duplicatePhoneNumber`StringAvailable since 1.59.0

The phone number that is already in-use.

`event.duplicateUsername`String

The username that is already in-use.

`event.existing`Object

The existing user that is using the requested email address or username. See the [Users API](https://fusionauth.io/docs/apis/users.md) for property definitions and example JSON.

`event.id`UUID

The unique Id of the event. You may receive an event more than once based upon your transaction settings. This Id may be used to identify a duplicate event.

`event.info.data`ObjectAvailable since 1.30.0

An object that can hold any information about the event that should be persisted.

`event.info.deviceDescription`StringAvailable since 1.30.0

The description of the device associated with the event.

`event.info.deviceName`StringAvailable since 1.30.0

The device name associated with the event.

`event.info.deviceType`StringAvailable since 1.30.0

The type of device associated with the event.

`event.info.ipAddress`StringAvailable since 1.27.0

The source IP address of the event.

`event.info.location.city`StringAvailable since 1.30.0

The city where the event originated.

**Note:** To use event location data, you'll need an Enterprise plan.

`event.info.location.country`StringAvailable since 1.30.0

The country where the event originated.

**Note:** To use event location data, you'll need an Enterprise plan.

`event.info.location.latitude`DoubleAvailable since 1.30.0

The latitude where the event originated.

**Note:** To use event location data, you'll need an Enterprise plan.

`event.info.location.longitude`DoubleAvailable since 1.30.0

The longitude where the event originated.

**Note:** To use event location data, you'll need an Enterprise plan.

`event.info.location.region`StringAvailable since 1.30.0

The geographic location where the event originated.

**Note:** To use event location data, you'll need an Enterprise plan.

`event.info.location.zipcode`StringAvailable since 1.30.0

The zip code where the event originated.

**Note:** To use event location data, you'll need an Enterprise plan.

`event.info.os`StringAvailable since 1.30.0

The operating system associated with the event.

`event.info.userAgent`StringAvailable since 1.30.0

The user agent associated with the event.

`event.linkedObjectId`UUIDAvailable since 1.53.0

The Id of the user related to this event.

`event.tenantId`UUID

The unique tenant identifier. This value may not be returned if not applicable.

`event.type`String

The event type, this value will always be **user.loginId.duplicate.create**.

`event.user`Object

The user that on the create request that attempted to use a duplicate login Id. See the [Users API](https://fusionauth.io/docs/apis/users.md) for property definitions and example JSON.

*Example Event JSON*

```json
{
  "event": {
    "createInstant": 1629436630996,
    "duplicateEmail": "ceo@example.com",
    "existing": {
      "active": true,
      "birthDate": "1981-06-04",
      "connectorId": "e3306678-a53a-4964-9040-1c96f36dda72",
      "data": {
        "Company": "Aviato",
        "foobar": "baz",
        "user_type": "iconoclast"
      },
      "email": "ceo@example.com",
      "firstName": "Ehrlich",
      "id": "9ea5b4b6-14df-44af-8a5e-c6e4bcb31ced",
      "insertInstant": 1625783576299,
      "lastLoginInstant": 1629232057071,
      "lastName": "Bachman",
      "lastUpdateInstant": 1628024498202,
      "passwordChangeRequired": false,
      "passwordLastUpdateInstant": 1625783576327,
      "registrations": [
        {
          "applicationId": "d23ecde6-0661-44a7-808b-a23013e6dfdc",
          "id": "1a01a91e-9861-490f-b4a0-5f91804fa06f",
          "insertInstant": 1626116367082,
          "lastLoginInstant": 1628102540879,
          "lastUpdateInstant": 1626116367082,
          "roles": [
            "USER"
          ],
          "usernameStatus": "ACTIVE",
          "verified": true
        },
        {
          "applicationId": "3c219e58-ed0e-4b18-ad48-f4f92793ae32",
          "id": "22e6a9b2-1d37-463f-8cba-1bd78aa74345",
          "insertInstant": 1625783576372,
          "lastLoginInstant": 1629232057071,
          "lastUpdateInstant": 1625783576372,
          "roles": [
            "admin"
          ],
          "usernameStatus": "ACTIVE",
          "verified": true
        }
      ],
      "tenantId": "a743e2cd-55bb-789c-b076-8846fdd3a51f",
      "twoFactor": {},
      "usernameStatus": "ACTIVE",
      "verified": true
    },
    "id": "faa4669c-8cfd-48fa-a6dd-9a1c1f783eff",
    "info": {
      "ipAddress": "71.229.161.136",
      "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36"
    },
    "type": "user.loginId.duplicate.create",
    "user": {
      "active": true,
      "birthDate": "1990-12-22",
      "connectorId": "e3306678-a53a-4964-9040-1c96f36dda72",
      "email": "ceo@example.com",
      "firstName": "Nelson",
      "id": "9ea5b4b6-14df-44af-8a5e-c6e4bcb31ced",
      "insertInstant": 1625783576511,
      "lastLoginInstant": 1625783576511,
      "lastName": "Bighetti",
      "lastUpdateInstant": 1628024498202,
      "passwordChangeRequired": false,
      "passwordLastUpdateInstant": 1625783576327,
      "tenantId": "a743e2cd-55bb-789c-b076-8846fdd3a51f",
      "twoFactor": {},
      "usernameStatus": "ACTIVE",
      "verified": true
    }
  }
}
```