Postage stamps or As evidence of payment of the postal service. Usually a rectangle of paper to stick on envelopes. Stamp with shapes or made of other materials , it has to be seen in a way.
Always print out a sheet of stamps with perforated holes around the stamps to increase the ease of tear. Tear is called the back teeth, stamps , stamps with adhesive coating. Newsprint usually have something extra to prevent spoofing , such as watermarks or embroidery.
Stamp collecting as a hobby, one that has been very popular .