What's the deal with Pen Cancels?!

Have you received items in the mail that have been scribbled over with pen?
Let's take a look at the many pen cancels that I and other philatelists have received and explore the reasons for them. Share your experiences with pen cancels in the comments.
Learn more about the sponsor: stamps.org/
Joe Sullivan's blog post 'the script cancel returns with a vengeance'
stampsite.org/...
#philately #stampcollecting #postalservice