Update a company customer

put

https://app.pennylane.com/api/external/v2/company_customers/{id}

This endpoint returns the updated company customer.

This endpoint requires the following scope: customers:all

Path Params

string

required

Company customer identifier

Query Params

use_2026_api_changes

boolean

Defaults to true

If you are already using the X-Use-2026-API-Changes header, you can ignore this parameter.

The Pennylane API is introducing important changes, which will be rolled out in three phases: preview, sunset and cleanup.

For new user, please use this parameter with true value to opt in directly to the new version of the API.

Preview phase: From January 14th to April 7th 2026. Opt in by setting this attribute to true to test and migrate to the new behavior.

Sunset phase: From April 8th to June 30th 2026. The new behavior becomes the default. Set this attribute to false if you need additional time to migrate.

Cleanup phase: Starting July 1st 2026 The old behavior will no longer be available. You must have migrated by this point.

For more details, see our API documentation https://pennylane.readme.io/docs/2026-api-changes-guide for migration instructions.

Body Params

name

string

vat_number

string

reg_no

string

phone

string

billing_address

object

delivery_address

object | null

payment_conditions

string

enum

Defaults to 30_days

Note that the custom option is only used on Pennylane's web app to avoid pre-filling the deadline when creating an invoice. On the API it has no effect and you will still have to provide a deadline when creating an invoice.

billing_iban

string | null

recipient

string

The name of the person to whom the invoice is addressed

reference

string | null

notes

string | null

emails

array of strings

emails

external_reference

string

You can use your own unique value when creating the customer. If not provided, Pennylane will pick one for you. Value must be unique

billing_language

string

enum

The language in which the customer will receive invoices. Default is fr_FR

Allowed:

Responses

200Returns the updated company customer

400Bad request

401Access token is missing or invalid

403Access to this resource forbidden

404The resource was not found

409Conflict with the current state of the target resource, such as when trying to create a resource that already exists.

422Unprocessable content