What is "imprinted stamp"

In philately, an imprinted stamp is a stamp printed onto a piece of postal stationery such as a stamped envelope, postal card, letter sheet, letter card, aerogram or wrapper. The printing may be flat upon the surface of the paper, or embossed with a raised relief. An imprinted stamp is also known as unadhesive stamp or indicium.

The cost of the item of stationery includes the manufacture of the item and the charge for postal service. The design of imprinted stamps often bears a close resemblance to normal adhesive stamps of the same country and era. It may be a definitive or commemorative stamp.