---
title: "Changes to Update a Fax Application"
method: PATCH
path: "/fax_applications/{id}"
---

# Changes to Update a Fax Application

`PATCH /fax_applications/{id}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 89 revisions.

- **2026-10-21** `67df31283a8a`: 2 breaking, 2 info
- **2026-10-15** `a72569d69430`: 2 breaking, 1 info

## Changes

- **2026-10-21** `67df31283a8a`: 2 breaking, 2 info
  - the `errors/items/code` response's property type changed from `integer` to `string`, and format from `int32` to no format for status `404`
  - the `errors/items/code` response's property type changed from `integer` to `string`, and format from `int32` to no format for status `422`
  - added the optional property `errors/items/description` to the response with the `404` status
  - added the optional property `errors/items/description` to the response with the `422` status
- **2026-10-15** `a72569d69430`: 2 breaking, 1 info
  - the `errors/items/code` response's property type changed from `string` to `integer`, and format from no format to `int32` for status `404`
  - the `errors/items/code` response's property type changed from `string` to `integer`, and format from no format to `int32` for status `422`
  - added the non-success response with the status `409`

---

[Operation](https://skmtc.dev/team-telnyx/apis/telnyx-api/docs/fax_applications/:id/patch.md) - [API](https://skmtc.dev/team-telnyx/apis/telnyx-api.md) - [Page](https://skmtc.dev/team-telnyx/apis/telnyx-api/changes/fax_applications/:id/patch)