I made a small trade back in May of this year with a member here in Southern Ontario, a few commons sent PWE. I received my cards within a week but his didn’t arrive, which was a first for me. I sent replacement cards in September and those didn’t make it either. Finally, I returned the member’s cards in October using CP's free Tuesday shipping and the cards were delivered.
I contacted CP about the failed delivery and they offered a refund of $5.00 which arrived yesterday. I figure I spent about $2.00 on postage and the cards themselves weren’t worth much.
In the end the member got their cards back, I got my postage paid for and someone somewhere got a PIF of worthless commons.
All's well that ends well.