Invoices are sent automatically via e-mail to the e-mail account set for your subscription. Invoices can be downloaded from the system at any time by choosing Administration → Billing → Manage billing details.
When you choose Manage billing details, a new browser window will open. Depending on your browser security settings, the browser might ask for a prompt.
On the Globalese Billing Portal, you can find the invoices in the Invoice History section at the bottom of the page:
Invoices can be downloaded by clicking the download button.