A method of operating a printer comprising at least one tray for retaining print media comprises reading a code associated with a quantity of print media, and associating the code with loading the quantity of print media in the tray in a database. If the print media in the tray is deemed unusual, based on types of media placed in the tray in the past, a human user near the printer is notified. The code on the print media is read through a wireless device in direct communication with a server retaining the database for a population of printers.