[Bocabirdman]

Originally Posted by slidekellyslide

How were the cards sent? Why was postage due on them? I sell a lot of postcards and twice I've had buyers tell me they had to pay postage to receive the items...both times a post office employee determined that my package was too thin to be sent with tracking so they automatically upgraded my package to priority and forwarded them on as "postage due".

This would be my guess