> ## Documentation Index
> Fetch the complete documentation index at: https://developers.tassyir.io/llms.txt
> Use this file to discover all available pages before exploring further.

# CANCEL_NOTE_REQUIRED

> HTTP 400, from POST /orders/{id}/cancel.

Its problem `type`: `https://developers.tassyir.io/errors/cancel-note-required`.

## What to do

Read the answer's `fix`: one sentence that says what to do. Act on the `code`, never on `title` or `detail`.

## Answered by

HTTP 400, from:

* [`POST /orders/{id}/cancel`](/api-reference/admin/orders/cancel-an-order)

The shape of every problem, and how `@tassyir/app` reports it: [Errors](/guides/errors).


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