---
title: "Changes to Send a fax"
method: POST
path: "/{custNr}/fax"
---

# Changes to Send a fax

`POST /{custNr}/fax`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 2 revisions.

- **2026-11-06** `64e666009b31`: 9 breaking, 1 info

## Changes

- **2026-11-06** `64e666009b31`: 9 breaking, 1 info
  - the request property `documents/items/data` became not nullable
  - the request property `documents/items/reference` became not nullable
  - the request property `meta/jobValid/start` became not nullable
  - the request property `renderingOptions/overlay` became not nullable
  - the request property `renderingOptions/paperFormat` became not nullable
  - the request property `statusReportOptions/httpStatusPush/credentials` became not nullable
  - the request property `statusReportOptions/httpStatusPush/principal` became not nullable
  - removed the enum value `ALL_PAGES,` of the request property `renderingOptions/overlay/mode`
  - the `documents/items/reference` request property type changed from `string` to `string, null`, and format from no format to `uri`
  - added the new `ALL_PAGES` enum value to the request property `renderingOptions/overlay/mode`

---

[Operation](https://skmtc.dev/retarus/apis/faxolution-for-applications-fax4a-rest-api/docs/:custNr/fax/post.md) - [API](https://skmtc.dev/retarus/apis/faxolution-for-applications-fax4a-rest-api.md) - [Page](https://skmtc.dev/retarus/apis/faxolution-for-applications-fax4a-rest-api/changes/:custNr/fax/post)