Once a payment is processed, the user will automatically receive a system generated payment receipt email from the payment processor.
This receipt cannot be edited; however, admins can make their own invoices in settings -> emails.
The receipt will be sent from the owner super admin's email address, to the email address on the user's checkout form. To change the email address the receipt is sent from, head to Project Settings -> "Payments" to update the email that receipts send from.
The payment receipt email will only be sent to the user. If you would like to be notified each time a user makes a payment, you can add Financial Contacts in settings --> project settings --> payments tab. Turn on Send Admins End-User Payment Notifications & save.