After every successful payment (a new subscription or an automatic renewal), an electronic invoice is generated and emailed to you automatically, with no action needed on your part.
You can also review all your accumulated invoices at any time from the "My Account & Subscriptions" page, under "Invoices" — each invoice shows its status (Sent / Pending) and a "View / Download PDF" button to save or print it.
If an invoice didn't arrive by email despite a successful payment, check your spam folder first, then download it directly from your account page if it appears there, or contact us if it doesn't appear at all.