| Time | Status | User Agent |  |
| :-- | :-- | :-- | :-- |
| Make a request to see history. |

#### URL Expired

The URL for this request expired after 30 days.

Very similar to the "Create an applicant" method.

However, `name`, `email`, and `phone_number` are not required. If they are passed, the applicant will be validated with the new values.

Passing `whats_app` as a value to the `phone_platform` argument will only update applicants that belong to accounts that have Whats App enabled.

Existing attributes are overwritten (except auto-generated attributes such as `created_at`), and new attributes are added.

If an existing attribute is set to `null` or `""`, it will be removed.

### Updating `data` keys of type `address`

> When attempting to update complex objects such as address type values, the "Body Params" builder and "Try It!" will not build the request correctly. Please use `curl` or Postman to build the request manually.

When updating a value that has a `data_key` of `type``address` you will want to submit the data in the following format. In this example, `address_key` is a `data_key` of `type``address`:

```undefined
{
  'data': {
    'address_key': {
      'country_code': 'United States',
      'city': 'Billings',
      'address_2': 'suite 301',
      'state_code': 'MT',
      'postal_code': '59101',
      'street_address': '327 Burlington',
      'country_code_iso': 'US',
      'state_code_iso': 'MT',
      'state_code_name': 'Montana',
    }
  }
}
```

### Secure Fields

You can also add secure fields by passing in a secure_data array along with the standard data array. These fields are encrypted in our system, so you should use them for personally identifiable and sensitive information like SSN, driver's license numbers, etc. Supported fields include:

- gender
- ethnicity
- citizenship
- can_work_in_us
- religious_preference
- income_salary
- income_income_tax_dollar_amount
- income_ss_tax
- income_medicare_tax
- income_taxpayer_identification_number
- driver_license_number
- driver_license_expiration_date
- driver_license_state
- ssn
- national_identification_number
- insurance_type
- insurance_benefactor_first_name
- insurance_benefactor_middle_name
- insurance_benefactor_last_name
- insurance_member_id
- insurance_company_group_id
- insurance_company_of_issue
- insurance_country_of_issue
- insurance_city_of_issue
- insurance_issue_date
- insurance_expiration_date
- bank_name
- bank_routing_number
- bank_account_number
- passport_number
- passport_country_of_issue
- passport_city_of_issue
- passport_issue_date
- passport_expiration_date
- vehicle_make
- vehicle_model
- vehicle_year
- vehicle_registration_plate_number
- vehicle_vin_number
- w4_federal_form
- w4_state_form

### API Response Codes

- `200      OK`
- `401      Unauthorized`

```shell
curl --request PUT \
     --url https://api.fountain.com/v2/applicants/id \
     --header 'accept: application/json' \
     --header 'content-type: application/json'
```