Oh, I am sorry I keep planning on answering the question but keep forgetting. I have had to pay postage due for 6 squishes. Honestly not a big deal, it is more a frustration to get the lecture each time! But I have figured what days to go to the PO to mail mine. Mondays and Fridays are the best days and Sat is by far the very worst day to get mail. I wonder if the mail carriers/cashiers eat mean pills on Sat! My Hubby says just don't go to the PO on Sat. Good advice!