What this means for users
If you receive an unexpected delivery, refund or account message, you can check it through Alexa for Shopping. The tool may also say it cannot verify a message; that is not confirmation that it is genuine.
What the source says
Amazon says the tool compares information about the sender, wording and time against its own communications. It gives three possible results: from Amazon, not from Amazon, or unable to verify.
This Alexa feature is launching in the United States. Amazon also describes separate verification options for customers elsewhere. Check your order and account from Amazon directly before acting on an unexpected message.
Official source
Read the original announcement for full details and current terms.
Amazon: How to verify Amazon messages with Alexa for Shopping