Writing on the Edge

See link for inspiration of this Idea. It states that the Postal Service routinely photographs both the front and the back side of every envelope, to catch messages associated with drug-money "drops". Well, obviously, ANY message you want to keep from such prying, that you are forgetful enough to not put on paper inside the envelope, needs to be written on the edge of the envelope!

For the average person to do such a thing, a clamp and a special pantograph is needed. An average pantograph lets you duplicate what you write, but some will create magnified/"duplicate" text, and some will create miniaturized/"duplicate" text. That last type is what you need, to write on the edge of the clamped envelope.

To read the text, the recipient only needs a good magnifying glass.

This Idea is Half-Baked simply because as soon as some Post Office worker reads it, extra pictures of the envelope will be taken. Ah, well.