I agree. I got two of these calls on my answering machine this week. Because it was out of the ordinary (I order quite frequently and have never had these calls before), I contacted Amazon directly through their website (not using the number left on the answering machine). They told me that no one from Amazon had called me and that they DO NOT call to verify online purchases made through a secure account. They advised AGAINST returning the calls as it was likely a SCAM.
I've gotten a call twice from this number, both times verifying if I made a purchase on Amazon because both purchases were high in value. 10 minutes after the call, my order was processed. These people ARE Amazon reps. They asked me if I ordered the items in question. A scammer would not know what I had purchased an hour before, and also the fact that they said they would process my purchase and 10 minutes later my order status has been updated. If you are reading this, don't be worried about being scammed. If you've recently made a purchase, get a call from this number, and they verify your order without you having to tell them what it is, you're fine. Not everything is a scam!
Please don't listen to this person. This number is legitimate. In two days I ordered two $200 eGift cards. The first day, after about two hours of my order stuck on "processing", I received a call from this number. They asked me if I ordered a $200 eGift card. I said yes. They said they would then process the transaction. 5 minutes later, the eGift card was sent to the recipient. The next day, same thing. I placed an order for a $200 eGift card. After about an hr of it processing, I received a call from this number asking if I made an order for a $200 gift card. I said yes. 5 minutes later, the gift card was sent. They are simply calling to confirm that you have made a purchase, that's it. I'm not "in" on the scam. This is a legitimate call from an Amazon rep.
That was definitely a scam. These A**holes ask you a "yes/no" question to record you saying yes. Then charge your credit cards. I would call your bank and inform them of that call.