On October 1st, 1998 the German Postal Service introduced a new product called pre-paid parcels with a hologram. This item is the combination of a box and a pre-paid postage label. The self-adhesive label (size 7.5 x 6.3 inch when applied) shows a picture in the top half, an area for sender and mailing address at the bottom, plus the pre-payment imprint and a hologram.
 

For information regarding the currently used labels:

please refer to my print publication "Hologram on Stamps" or contact me directly