The image below shows a hacker email telling you your credit card associated with your Amazon Prime account to going to expire. It shows 3 main ways to tell it is a scam email. Boxed in red the "from" email is not from amazon.com. The date of email is the same as the expiration date on your credit card. This creates a sense of urgency getting you to click on the "update" button to update your credit card information. If you put your mouse pointer over the update button without clicking on it, it will show the hacker web address instead of a amazon.com web address. When you do this, you will be asked for your password, credit card number and three digit security number. It will then ask you to confirm your billing and shipping addresses and finally phone number.