Since I started my little PWE campaign almost 2 months ago, I've sent out 37 PWE's with no return to senders. Until yesterday. I don't send too many cards in my PWE's, usually between 4 and 8, mostly because I want to avoid returns. This one came back with 'return to sender - nonmachinable surcharge'. Basically, it was too rigid to go through the machine.
Now this one wasn't any different than the rest I've sent out, so I'm going to try it again. But I hope this doesn't become a recurring issue or it will crimp my PWE lifestyle a bit!
Oh, for the unlucky soul, waiting for their precious PWE, the zip code was 92688.