# User data change

A user might request a data change when, for example, moving to a new city or getting married and thus changing their name or adding a nationality.

This guide outlines how to use the Investment API to change user data and the proof documents that must be provided in support of these changes.

## Prerequisites

Before you can change data of a user you must have created one. You can find out how to do this in our [User onboarding guide](/products/byol/guides/users/users_onboarding_overview).

## Changing user data

In the request body, you specify which fields you intend to change.

## Changeable data

You can change the following fields via the Investment API:

- first name
- last name
- salutation
- title
- birth date
- birth city
- birth country
- birth name
- nationalities
- address
- postal address


Data changes other than those listed are subject to a support request to Upvest.

## Request a change to user data

Changes to user data are achieved by posting a `data_change_request` for a specific user id:

**POST** [`/users/{user_id}/data_change_requests`](/api/users/user_data_change)

**Example request**


```json
{
  "first_name": "Franz",
  "last_name": "Müller",
  "address": {
    "address_line1": "Rosenweg 222",
    "postcode": "45678",
    "city": "Berlin",¯
    "state": "BE",
    "country": "DE"
  },
}
```

After you requested a data change, the user information will be adjusted on the Investment API and a [data change passed webhook](/api/users/user_event) will be sent.

Webhooks notify you of events in business processes, not the success or failure of the initialisation of those processes.

Please be sure to check the [HTTP status](/api_errors) of the response to your requests and handle failure cases appropriately.

## Next steps

Since a change to user data can made at any point in the user's lifecycle in the Investment API, a next step could be to [create an account group](/api/accounts/) or [place an order](/api/orders/place_order). You can see the updated data when [retrieving a report](/api/reports/retrieve_report).