Courtesy emails about overdue books are sent from an automated system. Normally, the reminders are sent one week before a book is due and one day after the due date. But occasionally the system goes down, and a reminder is not sent.
So, please make a note of due dates to avoid fines. If you need to check due dates for library materials, the circulation staff is happy to help in person or by phone (703.993.8120). Items may be renewed online via the library catalog if they are not overdue and do not have any holds or other renewal restrictions.