I do the water and sewer billing for a small city in Washington State. For years, customers complained about our postcard-sized bills -- which they said looked too much like junk mail. So we decided to start sending full-sized bills in envelopes.  

The month before the switch, I had a note printed on the cards, announcing the change.  

Two days later, I heard someone yelling at our receptionist, "Is this some kind of joke?"  When the customer threw his bill upon the desk, I saw his point. The note was . . .  

 . . . "Coming soon!  New Larger Bills!"