A long time ago when I was in college, my mom sent a small package that she had wrapped in a folded piece of bubble wrap inside a regular letter sized envelope.
There was clearly a problem with the machine as I received fragments of the envelope, a small portion of the letter she sent and a "Best of Motown 5" cassette tape. (Not what mom had sent...)
There was such a foul up at the post office that they put that all in a small USPS ziploc bag with a pre-printed apology on it. Evidently, these things happen from time to time, or they wouldn't have "apology baggies" already to go.
I'm glad everything worked out...and let's move on to other topics.