> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getlago.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Lago automatically generates invoices for each customer according to the plan model.

When a new invoice is generated, Lago also sends an `invoice.created` webhook
([learn more](/api-reference/webhooks/messages)).

When an invoice is linked to an add-on, another type of webhook is sent, called
`invoice.one_off_created`.

## Invoice object[](#invoice-object "Direct link to heading")

Invoices include (but are not limited to):

* Invoice number;
* Billing period;
* Customer information;
* Fees; and
* Taxes.

You can [download invoices](/guide/invoicing/download-invoices) or use the
[invoice object](/api-reference/invoices/invoice-object) to create your own invoice
template.

<Tip>
  You can also use the invoice object to transmit information to your accounting
  software or payment service provider.
</Tip>