I got a letter the other day with a Stamps.com stamp that had a picture and a 2d code right next to it. I did a double take.
Stamps.com must use these 2d codes to verify their printed stamps. This was kind of interesting until I noticed the United States Postage was using a 1"x1" red 2d code for verification too.
Is this new? Fedex, AirBorne, DHL use their own 2d codes to track their packages, but I wonder if the US Postal service is using these for tracking, verification or both.
What's next, an RFID tag in a stamp?
Has anyone else noticed this?