Occasionally Amazon has shipped me the same order twice - three times now in the last two years. Every time they told me just to keep it
Right now I am in a "situation" with Amazon. I ordered a portable drill on 11/26.
Using "super saver shipping". I was supposed to get it on Dec 2. I discovered that UPS had never received the package.
Anyhow, leaving out the gory details, Amazon reshipped the super saver order, and is sending me another one by one day shipping. If I get both of them, and they tell me to keep it, I'll send one to my son.