The trend in junk mail lately is to make the advertising look like something important that you really feel the need to open. There are quite a few tricks in the array of disguises an envelope can take, and Windell and Lenore at Evil Mad Scientist Laboratories have been collecting examples to share with you. How many different types of these "important" envelopes have you seen? By the way, "registered documents" is nothing like "registered mail." Link -via Boing Boing