Amazon Order Numbers must be retrieved from your Amazon account.
To find your 17-character unique Amazon Order Number (e.g. 123-4567890-1234567) navigate to Account & Lists → Your Orders while logged into your account used for the purchase.
The number appears in yellow under each item's title, formatted as three segments (e.g., 123-ABCDEFG-9876543).
Mobile users can swipe left on app orders to reveal "View Order Details" with the ID.