---
title: "Changes to Updates an existing fixed-amount billing entry. Only fields listed in the FieldsToUpdate array will be modified. Valid field names: Amount, InventoryItemIDFK, Notes."
method: PUT
path: "/api/FixedAmount"
---

# Changes to Updates an existing fixed-amount billing entry. Only fields listed in the FieldsToUpdate array will be modified. Valid field names: Amount, InventoryItemIDFK, Notes.

`PUT /api/FixedAmount`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 1 of 3 revisions.

- **2026-08-30** `e99843f3c878` — 1 info

## Changes

- **2026-08-30** `e99843f3c878` — 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/avaza/apis/avaza-api-documentation/docs/api/FixedAmount/put.md) · [API](https://skmtc.dev/avaza/apis/avaza-api-documentation.md) · [Page](https://skmtc.dev/avaza/apis/avaza-api-documentation/changes/api/FixedAmount/put)