Possibly a similar issue to bug 12971. Patrons' fines should show on "print summary" (i.e. members/summary-print.pl), and their outstanding balance should show in the "Total Due" row. No fines show, and "Total Due" is always 0. To replicate: Find a patron who has unpaid fines, go to their patron detail page (moremember.pl). Click on the 'Print' button and choose 'Print Summary' This *should* display the outstanding fines, and the total due; no fines display, and the total due shows as 0.
Tested on current master 3.21.00.041 I could not reproduce the issue, the summary printed fine for a patron with unpaid fines.
I cannot reproduce this in 3.23.