When returning items in the Circulation module there is a Check for Overdues check box at the top of the screen.  When this box is ticked a warning message will be displayed every time an overdue loan is returned.  This is useful for schools which keep a list of overdue loans of the Circulation desk which is marked each time an overdue is returned.  All other schools should turn this option off because it slows down the returns process.

Steps for Setting Check for Overdues on or off...

LibCode Suite / Utilities / Setup / Circulation Options / Check for Overdues… (simply by clicking on the Check for Overdues option it actually changes the setting.  Click it on or Click it off.