an unattended bicycle rental and security system , utilizing bi - directional communications with data verification between the individual bicycles and the system is provided which is equipped with an alarm , and can individually identify a number of bicycles and attribute their rental with corresponding customers . the unattended bicycle rental and security system is able to identify if a rental bicycle has sustained an impact during a rental that is sufficient to damage it and identify the customer whose care the rental bicycle was in at the time . the system also allows the integration of several rental locations allowing a bicycle to be rented at one location and returned at another .