I think I got caught by something like this. I bought a game before it was printed, and the publisher had it direct mailed from China where it was printed instead of the usual container shipping and individual mailing inside the US. I got notified of counterfeit postage so I had to pay $12 shipping to get it.
Quite a few of the buyers had to do that. I don't know if they had a few "mistakes" or if the entire shipment was fraudulently shipped and only some got caught