---
title: "Set Invoice Number Prefix"
method: PATCH
path: "/billing-settings/invoice-prefix"
tags: ["Invoice Number Prefix"]
---

# Set Invoice Number Prefix

`PATCH /billing-settings/invoice-prefix`

Updates the invoice number prefix for the given organization.

## Headers

- `organization_id` integer, required

## Request body

- object
  - `prefix` string, required — Primary invoice prefix
  - `secondary_prefix` string — Secondary invoice prefix

## Response `200`

Invoice prefix saved successfully

- object
  - `message` string
  - `data` object
    - `prefix` string — Primary invoice prefix
    - `secondary_prefix` string — Secondary invoice prefix
    - `module` string — Module identifier

## Other responses

- `401` — Unauthenticated
- `403` — Forbidden
- `422` — Validation error
- `500` — Internal server error

---

[API](https://skmtc.net/app4legal/apis/a4l-money-api.md) · [All operations](https://skmtc.net/app4legal/apis/a4l-money-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/app4legal/a4l-money-api/revisions/e0d144609998/schema)