The confirmation bccs that you receive if you opted to have one sent to you look very similar, but there is a slight difference. This is helpful if you want to know if an invoice was processed on your public site or your admin site on Quick Enroll.
Below is an example of an invoice that was processed on admin with Quick Enroll. The subject line says Registration Confirmation for Organization Name.
This is an example of a bcc of an enrollment that was completed on a public ASAP site. The subject line says Organization Name - Registration Confirmation.