VisitorRego has the ability to send an email notification that the labels in your printer are running low.
Setting up low label email notification
From Admin Mode select Options > System Set up
From the General Tab expand the Printers section
Tick the Low Label Alert box
Set the Low Label Threshold by entering a number into the field.
In the Staff To Notify field enter staff names as they appear in the Staff List. You can enter multiple names, separated by semicolons.