those are about 10 years old or so, they used to sell them in pads with carbon paper so you can keep records of who you gave them too.
The best we ever got, was when we used to hang out in a fast food parking lot, a buddy of ours put one on an offending car, and the cop that was patrolling the lot on foot saw him place something under the wiper. So he came walking over as my friend was walking back, walks up to the car, pulls the ticket and reads it to himself. Lets out hysterical laughter and puts it back under the wiper!
Was a classic moment.