Invoices can be found under Settings > Invoices inside your Pingdom account. This page lists all paid, unpaid and credited (cancelled) invoices. You can download copies or send copies via email on this page.
The information on the invoice (company name, address, etc) is taken from the Account Settings page and the invoices are generated automatically. This means the Account Settings page must be up to date before an invoice is created for the correct information to be displayed on the invoice.
If an invoice needs to be updated with new information you can reach out to the Support here. It's not possible to update existing invoices, but we can credit the faulty one and generate a new one with the correct information. The new invoice will have a new invoice ID and issuing date.
Invoices are generated on the account subscription renewal date, and the system will automatically try to charge the card on file (unless the account is set to invoice payment). If it succeeds in charging the card a payment confirmation email will be sent to the email address set as billing email on the Account Settings page, and a copy of the invoice will be attached.