I was gonna let him figure that one out on his own. First post and its looking for a decal...my mind wonders.
FYI, when you get your packet from NREMT after passing, they have an order form in there for you to order all kinds of cool stuff. However it requires you writing your cert number and it being verified as well prior to placing the order.
you don't have to advertise it. But if you do....try and limit it to one sticker per vehicle and don't be like the whackers out there and put a dozen stickers on there featuring Calvin and other characters plus 2 or more IAFF stickers.