Every purchase made on a personal account gets an invoice you can download at any time.

Each row shows the date of the purchase and a description naming the plan it was for — for example Headshot Purchase — Basic. The download button at the end of the row opens the invoice.
If you have not bought anything yet, the page reads "You don't have any invoices yet."
The page footer carries a contact address for billing questions: hello@headshotphoto.io.