even some we shouldn’t get. If you use the PBS offices return address on your wrapper, and you send out books that are returned, they come back to us. The most common cause of returned books lately seems to be the “13-ounce rule”: if you mail a package over 13 ounces using only stamps for postage, it needs to be handed to a PO employee (this is a USPS regulation). A package over 13 ounces bearing postage stamps that is NOT handed to a PO employee is returned. If it comes to us, we have to make a trip to our local PO to mail it. We will notify you if this happens, and each account gets a “free” remailing from us; but if this continues to be a problem with a sender, we will charge a credit for the trouble of each PO trip to re-send your books. Gas is nearly as expensive as gold these days. You can easily avoid this problem by using PBS Printed Postage to mail your books–the 13-ounce rule doesn’t apply, since the postage is traceable to the sender Plus, Printed Postage gets you Instant Credit when you mark the book mailed! Can’t beat that.