---
title: "Start registrant change"
method: POST
path: "/{account}/registrar/registrant_changes"
tags: ["registrant changes"]
---

# Start registrant change

`POST /{account}/registrar/registrant_changes`

Start registrant change.

## Path parameters

- `account` integer, required

## Request body

- object
  - `domain_id` union, required
    - string
    - integer
  - `contact_id` union, required
    - string
    - integer
  - `extended_attributes` TradeExtendedAttributes

## Response `201`

Successfully changed the contact.

- object
  - `data` RegistrantChange, required
    - `id` integer, required
    - `account_id` integer, required
    - `contact_id` integer, required
    - `domain_id` integer, required
    - `state` 'new' | 'pending' | 'cancelling' | 'cancelled' | 'completed', required
    - `extended_attributes` TradeExtendedAttributes, required
    - `registry_owner_change` boolean, required
    - `irt_lock_lifted_by` string, date, required — A date value formatted as ISO 8601.
    - `created_at` string, date-time, required — A date-time value, representing when the entry was created, formatted as ISO 8601.
    - `updated_at` string, date-time, required — A date-time value, representing when the entry was last updated, formatted as ISO 8601.

## Other responses

- `202` — The contact change has started and pending completion.
- `400` — A required parameter is missing or the request is invalid.

## Changes

- **2025-07-11** (v2) `06780be0ef17` — 2 breaking, 24 info
  - the request property `contact_id` became required
  - the request property `domain_id` became required
  - the response property `data` became required for the status `201`
  - the response property `data` became required for the status `202`
  - …22 more
- **2023-08-02** (v2) `425ad99b3e0d` — 2 warning, 2 info
  - removed the optional property `data/lock_lifted_by` from the response with the `201` status
  - removed the optional property `data/lock_lifted_by` from the response with the `202` status
  - added the optional property `data/irt_lock_lifted_by` to the response with the `201` status
  - added the optional property `data/irt_lock_lifted_by` to the response with the `202` status
- **2023-07-26** (v2) `fb9b4727973a` — 1 info
  - endpoint added
- **2023-07-18** (v2) `c8591dcf8c29` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/dnsimple/apis/dnsimple-api/changes/:account/registrar/registrant_changes/post.md)

---

[API](https://skmtc.dev/dnsimple/apis/dnsimple-api.md) · [All operations](https://skmtc.dev/dnsimple/apis/dnsimple-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/dnsimple/dnsimple-api/revisions/f0f58c839e7d/schema)