---
title: "Apply a Credit Note to an Invoice"
method: POST
path: "/credit-note-applications"
tags: ["Credit Notes"]
---

# Apply a Credit Note to an Invoice

`POST /credit-note-applications`

Allocates an amount from a Credit Note's balance to an Invoice's balance.

## Headers

- `Authorization` string, required
- `sequence-version` '2024-07-30'

## Request body

- CreateCreditNoteApplicationEndpointCreateCreditNoteApplicationRequestModel
  - `creditNoteId` string, required — The Credit Note to draw from
  - `invoiceId` string, required — The Invoice to apply credit to
  - `amount` number, required — Amount to allocate from the Credit Note to the Invoice.
  - `currency` 'AED' | 'ARS' | 'AUD' | 'BRL' | 'BGN' | 'CAD' | 'CHF' | 'CLP' | 'CNY' | 'COP' | 'CZK' | 'DKK' | 'EGP' | 'EUR' | 'GBP' | 'HKD' | 'ILS' | 'INR' | 'ISK' | 'JPY' | 'KRW' | 'MXN' | 'NOK' | 'NZD' | 'PLN' | 'SAR' | 'SEK' | 'SGD' | 'THB' | 'USD' | 'UYU' | 'ZAR', required
  - `creditNoteBalanceVersion` integer, required — Expected current balance version of the Credit Note (for OCC)
  - `invoiceBalanceVersion` integer, required — Expected current balance version of the Invoice (for OCC)

## Response `200`

OK

## Other responses

- `201` — Created
- `400` — Bad Request
- `401` — Unauthorized
- `409` — Conflict
- `500` — Internal Server Error

## Changes

> 714 revisions in range; 511 could not be searched.

- **2026-06-17** `d01512162768` — 1 breaking, 2 warning, 2 info
  - the `appliedAt` response's property type/format changed from `string`/`date-time` to `string`/`` for status `201`
  - deleted the `header` request parameter `Idempotency-Key`
  - deleted the `header` request parameter `Sequence-Version`
  - added the new optional `header` request parameter `sequence-version`
  - …1 more
- **2026-06-16** `12ab2101be2a` — 2 breaking, 1 warning, 1 info
  - added the new required `header` request parameter `Idempotency-Key`
  - removed the success response with the status `200`
  - deleted the `header` request parameter `sequence-version`
  - added the new optional `header` request parameter `Sequence-Version`
- **2026-06-16** `c5cfe471a2b3` — 1 breaking, 2 warning, 2 info
  - the `appliedAt` response's property type/format changed from `string`/`date-time` to `string`/`` for status `201`
  - deleted the `header` request parameter `Idempotency-Key`
  - deleted the `header` request parameter `Sequence-Version`
  - added the new optional `header` request parameter `sequence-version`
  - …1 more

[Change history](https://skmtc.dev/sequencehq/apis/sequence/changes/credit-note-applications/post.md)

---

[API](https://skmtc.dev/sequencehq/apis/sequence.md) · [All operations](https://skmtc.dev/sequencehq/apis/sequence/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sequencehq/sequence/revisions/e520d2f95b7b/schema)