SyliusInvoicingPlugin creates new immutable invoice when the order is in given state (default: created) and allows both customer and admin to download invoices related to the order.

The primary aim of Invoicing Plugin is to create a document representing Customer's will to buy particular products and pay for them.

An Invoice can also be treated as a proof of placing an Order. Thus, it is downloadable as .pdf file and can be sent to Customer manually by the Administrator or automatically once an Order is paid.