[Koha] Paying fines?

(Koha 3.0alpha, (Gentoo) Linux 2.6.24, MySQL 5.0.56) I have my fine rules setup and bin/cronjobs/fines2.pl running every night to generate fines. They are being calculated correctly, so that much is good. However, when an overdue item with fines is checked back in, nothing prompts the librarian that the fine is due. The check-in page (returns.pl) simply shows that the item has been checked in, with no other alerts. So how is a librarian supposed to know at the time of check-in that the patron owes a fine (either for the book being checked in OR for prior fines that haven't yet been paid)? The check-in or check-out time is definitely when you want to inform the librarian about a fine owed by the patron. Thanks.