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Fortnox

Interact with the Fortnox accounting API

Actions25

Customer → Update

AI-generated

Summary

Update a customer record in Fortnox by specifying the tenant ID, the existing customer number, and the fields to update.

Inputs

  • Tenant ID (required) — The numeric tenant identifier for the Fortnox company. Obtained during OAuth consent onboarding via the Fortnox Auth Callback node.
  • Customer Number (required) — The unique customer number in Fortnox identifying the customer to update.
  • Update Fields — A collection of customer properties to update, including fields such as name, address, city, contact info, financial defaults, and customer type.

Output shape

a single customer object representing the updated customer record

The output is the updated customer data returned from Fortnox. Only customers with the specified Customer Number are updated. The update applies only to fields provided in Update Fields; unspecified fields remain unchanged. Errors are returned if the update fails.

Examples

Example 1: Update the email and phone number for a specific customer

Specify Tenant ID and Customer Number of the existing customer, then set Email and Phone 1 in Update Fields to new values.

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