Billingo is a well-known financial tool in Hungary. It has many useful services, the Billingo Invoicing extension uses the invoice generation part of them. You can configure Billingo to synchronize with NAV (as it is compulsory in Hungary).
You'll need the "API és tömeges számlagenerálás kiegészítő" subscription to make the plugin working.
The Billingo Invoicing plugin can create an invoice for you automatically after every payment in your nopCommerce store.
Easy configuration in the admin area
Generate invoice automatically after every payment
The invoice includes the concrete items and quantities
Sending the invoice in email through Billingo
NO WARRANTY, use at your own risk! You can find the source code below.
On the configuration page, the language is Hungarian because Billingo operates in Hungary.
You should only use PayPal payment with this extension.
Download the plugin archive.
Go to admin area > configuration > local plugins.
Upload the plugin archive using the "Upload plugin or theme" plugin.
Scroll down through the list of plugins to find the newly installed plugin. Click on the "Install" button to install the plugin.
Please find more information about how to install plugins here.
The plugin is provided absolutely for free and includes source code. Find the project's GitHub repository here.