Due dates can be displayed for every book in the user account in the online catalog of Freie Universität Berlin. Due dates never fall on days when the library is closed (holidays, inventory), so there is no risk of unjustified warnings, and it is always possible to return books with no problem. If you give us your e-mail address (students of Freie Universität Berlin can enter their e-mail address themselves in their own user account), the system will send you a reminder e-mail shortly before materials are due. These reminder mails are provided as a service of the library system of Freie Universität Berlin. This service does not relieve you of the obligation to keep track of due dates for materials you have checked out yourself and to return materials on time. If you do not receive a reminder mail, that does not mean you are exempt from any overdue fees that may apply.