---
title: "Add the identification data for an external party for a payroll administration"
method: POST
path: "/v2/providers/employers/payrollAdministrations/{payrollAdministrationId}/ExternalPartyIdentifications\""
tags: ["Upa pension declaration"]
---

# Add the identification data for an external party for a payroll administration

`POST /v2/providers/employers/payrollAdministrations/{payrollAdministrationId}/ExternalPartyIdentifications"`

## Request

- Base URL: `https://api.loket.nl`
- URL: `https://api.loket.nl/v2/providers/employers/payrollAdministrations/{payrollAdministrationId}/ExternalPartyIdentifications"`
- Auth: none required

__Activity name :__ <a href="https://developer.loket.nl/Activities/PostExternalPartyIdentificationByPayrollAdministrationId" target="_blank">PostExternalPartyIdentificationByPayrollAdministrationId</a>

Add the identification data for an external party for a payroll administration

__Metadata:__ Possible options for fields of the type 'metadata' can be acquired(GET)by adding `/metadata` to the POST URL.

__Defaults:__ Geen

## Path parameters

- `payrollAdministrationId` string, uuid, required

## Headers

- `Authorization` string, required
- `Accept` string, required

## Request body

- ExternalPartyIdentificationPost
  - `id` string, uuid: The unique identifier of an object (GUID/UUID)
  - `externalParty` ExternalPartyReadOnlyFalse: External party (externe partij)
    - `key` integer
    - `value` string
  - `externalIdentification` string: External identification (externe identificatie) For a UPA pension provider use the idLCr

## Response `201`

Created

- object: a warning indacateds that the given payload is valide, however take notice of the warning this might ifluence behavour.
  - `version` Version
    - `obsoleteDate` string, date, nullable: The date (can be null) on which the `resourceVersion` is no longer supported/available
    - `resourceVersion` string, date: The resource version of the object in the response
  - `messages` object[]
    - `type` string: Indication of the type of message. See [the general documentation for more information](./#section/Response/Messages)
    - `description` string: Describes the message
    - `id` string, uuid, nullable: In some cases when the message may relate to a specific entity, or specific group of entities, this field provides the identifier of that entity
    - `code` integer: Identifying code for the message
    - `properties` string[]: An array that can contain additional information
  - `content` ExternalPartyIdentificationPut
    - `id` string, uuid: The unique identifier of an object (GUID/UUID)
    - `externalParty` ExternalPartyReadOnlyTrue: External party (externe partij)
      - `key` integer
      - `value` string
    - `externalIdentification` string: External identification (externe identificatie) For a UPA pension provider use the idLCr

## Other responses

- `400`: Bad Request
- `401`: Unauthorized
- `403`: Forbidden
- `404`: Not Found
- `500`: Internal Server Error

---

[API](https://skmtc.dev/loket/apis/loket-api.md) - [All operations](https://skmtc.dev/loket/apis/loket-api/llms.txt) - [OpenAPI document](https://skmtc.dev/loket/apis/loket-api/revisions/32170564148f?raw)