Invoice

Invoices are final and cannot be modified. A PDF receipt will be created immediatly after the entity was created.

A invoice always contains a invoice number ( invoice_number ). If the invoice was imported the entity may contain a ( external_invoice_number ). If that field is not empty the content of this field should be used as the valid invoice number in any accounting context.

Invoice typ:

• 1 - Regular invoice
• 2 - Cancellation
• 3 - Interim
• 4 - Final invoice ( after interim )

Status:

• 1 - Open
• 2 - Payed
• 3 - Cancelled

OpenAPI description:

• Endpoint to load a single invoice
• Endpoint to load a list of invoices
• Endpoint to get the PDF receipt