You can view and download your invoices anytime in your customer account.
Log in to CloudPit and click on My CloudPit at the top right.

In the My CloudPit section, you will see your open and paid invoices.
There you can view invoices, download them, or pay open invoices.

If a suitable payment method is stored, open invoices can be paid directly.
Log in to the Controlpanel and open Account → Invoices.
There you will find an overview of your invoices. You can view them or download them as a PDF.

Additionally, you will receive invoices by email by default after the invoice has been issued.
If you do not want to receive invoices by email, open Account → Notifications.
Deactivate the option Receive invoices by email and save the change.