oh my! Using rubber stamps, embossing ink, embossing powder and a heat source is one way to get the job done, but there are other options as well, like embossing markers or embossing pens.

One popular innovation to address potential reuse was a waffle-pattern embossing ... This allowed cancellation ink to seep into a stamp rather than sit on top of it, preventing reuse.

The Post-office Department has adopted the following rules for embossing postage stamps upon envelopes or paper, presented by private parties: 1. Applications must be made to the Postmaster of the ...