You Get 5 Window Stickers
Simply put your own note inside when you see drivers park where they shouldn't.
Then watch their reaction when they come back to their car & see one of these on the windscreen.

 THEY LOOK LIKE THE REAL THING, UNTIL THEY READ THE  NOTE YOU'VE PUT INSIDE.

I ALSO SELL STICKERS WITH TICKETS SEE MY OTHER ITEMS FOR SALE