The Karl Knauer KG developed and realized an innovative reply card for the Bayer product Levitra. It can be opened by tearing off a perforated tab, and resealed again without any additional aids. The folding and sealing techniques guarantee that the sensitive answer data remains securely covered. To read the card, the seal must be destroyed. This way dispatch is easy to control. Several million cards are used annually in the USA. They can be added to compact products, or inserted. For the production of the cards Karl Knauer developed a specific solution in internal special machine construction.