Originally Posted by thehawk75

Is this the full SSN or the last 4 of it?

These are actually two different forms to be filled in, and used for different purposes.

The 'last 4 of SSN' form is required to be filled in when they can't verify your identity via the drivers license number. Ultimately If they fail to verify you (drivers ID or last 4 of SSN), then they will shut down your account (well rather leave you with the only options of withdrawing whatever is currently in your account or refunding previous payments).

As far as full SSN goes, I guess we'll all have to fill it in one of these days, I still haven't though.

I have doubts that they'll unfreeze you for simply providing SSN. What was the exact text of your 'freeze e-mail' ?