Find an invoice
Invoices in The Fox Den lists what the account has bought, with any credits against it. Open one to see its details, and choose Download PDF for a copy.
Where invoices are emailed
Each invoice is emailed to the person who made the purchase, and to the account's billing email if it has one.
The account owner sets the billing email and address on Home: choose Edit on the account's details. The billing address is also filled in for you at checkout.
Credits
If part of a purchase is refunded or credited, a credit note shows against the invoice, and you can download it too.
Upgrading an event to a larger plan credits the add-ons the new plan includes. Their credit note shows against the add-ons' invoice, and the money goes towards the upgrade's invoice, so you pay less for it. See Plans and add-ons.