Two Factor Authentication for Amazon account holders

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Amazon's Two-Step Verification adds an additional layer of security to your account. Instead of simply entering your password, Two-Step Verification requires you to enter a unique security code in addition to your password during sign in.

Amazon Support: Amazon.com Help: About Two-Step Verification

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To enable Two-Step Verification:

1. Go to Your Account and select Change Account Settings.
2. Click Edit in the Advanced Security Settings section.
3. Click Get Started to set-up Two-Step Verification.
4. Add your primary phone number (this phone must be able to receive SMS messages) or download and configure an authenticator app and click Send code.
5. Enter the code that was sent to your phone number or generated through the authenticator app and click Verify code and continue.
6. Do either of the following:
   • Add a back-up phone number and decide on delivery format (text message or voice call).
   • Download and configure an authenticator app. This will allow you to generate security codes when you're unable to receive messages to your device.
   Note: You won't be able to turn on Two-Step Verification without adding a back-up phone number . This is so that you have a back-up option to receive a security code if you no longer have access to your primary mobile device .
   
   
7. You won't be able to turn on Two-Step Verification without adding a back-up phone number . This is so that you have a back-up option to receive a security code if you no longer have access to your primary mobile device.

How-to: Amazon.com Help: Turning On Two-Step Verification