Each night that Night Audit runs, there is an email generated by BookingCenter that is titled "<SiteID> Charge Folio Results for <SystemDate>".  This email lists the in-house rooms, guest names, and amount charged to each folio via the 'Charge Folios' process part of Night Audit.

The email is sent to the main email address of the property, as set under Setup | Settings | Site Detail.  This is a good email to have your staff, or accountant, look at each day to make sure all rates were charged correctly to each in-house Guest.

If there were manually charged RENT charge, see this article to explain the effects of the manual 'Add Charge' of RENT on Night Audit: https://support.bookingcenter.com/index.php?/Knowledgebase/Article/View/348

To make sure that the Night Auditor never forgets to 'Charge Folios' see this article above to to make that a requirement.