Update a credit memo

Operation ID: updateCreditMemo

Group: Accounting › Credit Memos

Open in the interactive reference

PATCH /accounting/credit-memos/{id}

Retry-safe: A write that accepts Idempotency-Key: repeating a request with the same key replays the stored answer instead of executing twice.

Updates a credit memo with the fields you send. A field you leave out keeps its current value. updateLines changes only the description of each line you name, and a line you leave out keeps its description.

Use the credit memo's id, not its creditMemoNumber.

The response is empty. To apply the credit memo to invoices, use POST accounting/credit-memos/:id/apply.

Parameters

Name In Type Required Description
Api-Version header string · v1 yes The API version this request targets, named by its public identifier. Required on every request; omitting it, or naming a version this company does not have, is answered with 400. This document describes version v1.
Idempotency-Key header string no An opaque caller-chosen string (1-255 characters) that makes this request safe to retry. Repeating the same key with an identical request body replays the original response instead of re-executing - but only once that original request succeeded; a failed attempt re-executes on retry. Repeating the key with a different body is answered with 422. A key still in flight is answered with 409 - as is a key whose original request was interrupted before it finished, for a few minutes afterwards, until that attempt is presumed dead. A completed response stays replayable for 24 hours. The key is scoped to the caller, not to the action: reusing it for a different action is answered with 409 or 422 rather than treated independently. On read actions this header is ignored. On write actions that cannot offer the guarantee it is answered with 400 IDEMPOTENCY_NOT_SUPPORTED rather than silently ignored.
id path string yes The unique identifier of the credit memo you want to update.

Request body

Required, application/json: updateCreditMemoInput.

Field Type Required Description
creditMemoDate date no The new issue date. Use format YYYY-MM-DD.
description string no The new description.
externalCreditMemoId string no The new identifier of this credit memo in an external source system.
updateLines array<object> no The line edits, keyed by line id. Only the description can be edited. Lines cannot be added or removed here.
updateLines[].id string yes The unique identifier for the credit memo line to edit, as returned by GET accounting/credit-memos/:id.
updateLines[].description string no The new line description, as shown to the customer. On a manual credit memo it cannot be cleared, because a description is required there. 
{
  "creditMemoDate": "2026-01-15",
  "description": "<description>",
  "externalCreditMemoId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "updateLines": [
    {
      "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "description": "<description>"
    }
  ]
}

Response

200 Success

{
  "data": {},
  "diagnostics": [
    {
      "code": "<code>",
      "message": "<message>",
      "severity": "error",
      "path": [
        "<path>"
      ],
      "details": "<details>"
    }
  ]
}

Response headers

Errors

Code Status
NOT_FOUND 400
LINE_NOT_FOUND 400
LINE_DESCRIPTION_REQUIRED 400
IDEMPOTENCY_KEY_CONFLICT 409
IDEMPOTENCY_PAYLOAD_MISMATCH 422

Statuses