---
title: "Changes to Create an Associated Identity"
method: POST
path: "/identities/{identity_id}/associated_identities"
---

# Changes to Create an Associated Identity

`POST /identities/{identity_id}/associated_identities`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 2 of 9 revisions.

- **2026-08-22** `7919e33b4853` — 8 breaking, 1 warning, 18 info
- **2026-08-08** `5426f6f99c52` — 1 breaking

## Changes

- **2026-08-22** `7919e33b4853` — 8 breaking, 1 warning, 18 info
  - added the new required request property `entity/personal_address/city`
  - added the new required request property `entity/personal_address/country`
  - added the new required request property `entity/personal_address/line1`
  - added the new required request property `entity/personal_address/postal_code`
  - added the new required request property `entity/personal_address/region`
  - the `entity/personal_address` request property type/format changed from ``/`` to `object`/``
  - the response property `entity/personal_address` became nullable for the status `201`
  - the `entity/personal_address` response's property type/format changed from ``/`` to `object`/`` for status `201`
  - removed `#/components/schemas/address` from the `entity/personal_address` request property `allOf` list
  - added the new optional request property `entity/business_tax_id_fingerprint`
  - added the new optional request property `entity/business_tax_id_provided`
  - added the new optional request property `entity/personal_address/line2`
  - added the new optional request property `entity/tax_id_fingerprint`
  - added the new optional request property `entity/tax_id_provided`
  - the request property `entity/personal_address` became nullable
  - added the optional property `additional_underwriting_data/annual_card_volume` to the response with the `201` status
  - added the optional property `entity/business_tax_id_fingerprint` to the response with the `201` status
  - added the optional property `entity/business_tax_id_provided` to the response with the `201` status
  - added the optional property `entity/personal_address/line2` to the response with the `201` status
  - added the optional property `entity/tax_id_fingerprint` to the response with the `201` status
  - added the optional property `entity/tax_id_provided` to the response with the `201` status
  - removed `#/components/schemas/address` from the `entity/personal_address` response property `allOf` list for the response status `201`
  - added the required property `entity/personal_address/city` to the response with the `201` status
  - added the required property `entity/personal_address/country` to the response with the `201` status
  - added the required property `entity/personal_address/line1` to the response with the `201` status
  - added the required property `entity/personal_address/postal_code` to the response with the `201` status
  - added the required property `entity/personal_address/region` to the response with the `201` status
- **2026-08-08** `5426f6f99c52` — 1 breaking
  - the `entity/default_statement_descriptor` request property's maxLength was decreased to `20`

---

[Operation](https://skmtc.dev/finix/apis/finix-api-reference/docs/identities/:identity_id/associated_identities/post.md) · [API](https://skmtc.dev/finix/apis/finix-api-reference.md) · [Page](https://skmtc.dev/finix/apis/finix-api-reference/changes/identities/:identity_id/associated_identities/post)