Finalise a draft invoice, moving it to open. Finalising allocates the invoice number, locks the line items and queues the invoice document for rendering.
Invoices created through create an invoice are already finalised, so this endpoint only applies to invoices a product module created with auto_finalise: false.
Invoicing is opt-in per organization: unless the invoicing feature flag is enabled for your organization this endpoint returns 403.
The invoice is not in draft, so it cannot be finalised.
Invoicing is not enabled for the organization, or the caller is missing the invoices:create permission.
No such invoice, or the caller's user group does not grant access to its policy.
The invoice was modified by a concurrent writer before the transition could be applied.