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Fortnox

Consume the Fortnox API

Actions110

Invoice → Update

AI-generated

Summary

Update an existing Fortnox invoice by document number.

Inputs

  • Document Number (required) — The document number of the invoice to update.
  • Invoice Rows — Collection of rows to set on the invoice. Each row can specify article number, description, delivered quantity, account number, price, discount, unit, VAT, cost center, project, house‑work flags, etc.
  • Update Fields — Collection of header fields to modify on the invoice (addresses, city, country, currency, dates, email, language, OCR, references, phone numbers, project, remarks, tax reduction type, terms of delivery/payment, VAT included flag, way of delivery, order/reference numbers, zip code, etc.).

Output shape

Fortnox invoice object

Returns the updated invoice as received from the Fortnox API, reflecting the changes made via Document Number, Invoice Rows, and Update Fields.

Examples

Example 1: Change an invoice's due date and add a new row.

Provide the Document Number, set Due Date in Update Fields, and add a row in Invoice Rows.

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