I notice that in addition to this question on the main page:
Originally Posted by amazon
As a result of changes to federal regulations, Amazon Payments requires that you provide your tax identity information. Start now.
They now additionally have this question (right underneath):
Originally Posted by amazon
Important Message:
Please verify your account information as soon as possible to maintain your account privileges.
To complete this step - click here.
With a little red Octagon next to it too.
Strange thing is, the second question only asks for your last 4 digits of your SSN (where as the first one asks for the entire SSN).
So, is this a redundant question for everyone, or, are they now offering an alternate way to 'validate' without entering in all 9 digits.